TY  - JOUR
AU  - Qarony, Wayesh
AU  - Hossain, Mohammad Ismail
AU  - Tamang, Asman
AU  - Jovanov, Vladislav
AU  - Shahiduzzaman, Md.
AU  - Ahamed, Md. Shamim
AU  - Pala, Ragip A.
AU  - Salleo, Alberto
AU  - Tsang, Yuen Hong
AU  - Knipp, Dietmar
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7230
AB  - This study aims to determine the maximum possible energy conversion efficiency of visibly transparent solar cells using the detailed balance limit (also known as the Shockley–Queisser limit) and compare it to the efficiency of traditional single-junction solar cells. To achieve this, a new optical nanoantenna has been designed to absorb incoming light selectively, enhancing the average visible transmission while maintaining high absorption in the infrared and UV regions. The color appearance of the antennas has also been evaluated through colorimetrical characterization. Our findings indicate that it is possible to achieve high average visible transparency and energy conversion efficiency of over 80 and 18%, respectively, by carefully selecting semiconductor materials. Such solar cells are versatile enough to be integrated seamlessly into smart windows, agrivoltaic concepts in open and protected cultivation, mobile devices, and appliances without compromising their appearance or functionality. The dimensions and optics of the proposed antennas and visibly transparent solar cells have been thoroughly discussed.
PB  - American Chemical Society (ACS)
T2  - ACS Photonics
T1  - On the Potential of Optical Nanoantennas for Visibly Transparent Solar Cells
VL  - 10
IS  - 12
SP  - 4205
EP  - 4214
DO  - 10.1021/acsphotonics.3c00932
ER  - 

@article{
author = "Qarony, Wayesh and Hossain, Mohammad Ismail and Tamang, Asman and Jovanov, Vladislav and Shahiduzzaman, Md. and Ahamed, Md. Shamim and Pala, Ragip A. and Salleo, Alberto and Tsang, Yuen Hong and Knipp, Dietmar",
year = "2023",
abstract = "This study aims to determine the maximum possible energy conversion efficiency of visibly transparent solar cells using the detailed balance limit (also known as the Shockley–Queisser limit) and compare it to the efficiency of traditional single-junction solar cells. To achieve this, a new optical nanoantenna has been designed to absorb incoming light selectively, enhancing the average visible transmission while maintaining high absorption in the infrared and UV regions. The color appearance of the antennas has also been evaluated through colorimetrical characterization. Our findings indicate that it is possible to achieve high average visible transparency and energy conversion efficiency of over 80 and 18%, respectively, by carefully selecting semiconductor materials. Such solar cells are versatile enough to be integrated seamlessly into smart windows, agrivoltaic concepts in open and protected cultivation, mobile devices, and appliances without compromising their appearance or functionality. The dimensions and optics of the proposed antennas and visibly transparent solar cells have been thoroughly discussed.",
publisher = "American Chemical Society (ACS)",
journal = "ACS Photonics",
title = "On the Potential of Optical Nanoantennas for Visibly Transparent Solar Cells",
volume = "10",
number = "12",
pages = "4205-4214",
doi = "10.1021/acsphotonics.3c00932"
}

Qarony, W., Hossain, M. I., Tamang, A., Jovanov, V., Shahiduzzaman, Md., Ahamed, Md. S., Pala, R. A., Salleo, A., Tsang, Y. H.,& Knipp, D.. (2023). On the Potential of Optical Nanoantennas for Visibly Transparent Solar Cells. in ACS Photonics
American Chemical Society (ACS)., 10(12), 4205-4214.
https://doi.org/10.1021/acsphotonics.3c00932

Qarony W, Hossain MI, Tamang A, Jovanov V, Shahiduzzaman M, Ahamed MS, Pala RA, Salleo A, Tsang YH, Knipp D. On the Potential of Optical Nanoantennas for Visibly Transparent Solar Cells. in ACS Photonics. 2023;10(12):4205-4214.
doi:10.1021/acsphotonics.3c00932 .

Qarony, Wayesh, Hossain, Mohammad Ismail, Tamang, Asman, Jovanov, Vladislav, Shahiduzzaman, Md., Ahamed, Md. Shamim, Pala, Ragip A., Salleo, Alberto, Tsang, Yuen Hong, Knipp, Dietmar, "On the Potential of Optical Nanoantennas for Visibly Transparent Solar Cells" in ACS Photonics, 10, no. 12 (2023):4205-4214,
https://doi.org/10.1021/acsphotonics.3c00932 . .

TY  - JOUR
AU  - Qarony, Wayesh
AU  - Hossain, Mohammad I.
AU  - Jovanov, Vladislav
AU  - Salleo, Alberto
AU  - Knipp, Dietmar
AU  - Tsang, Yuen Hong
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6836
AB  - Perovskite/silicon tandem solar cells are considered as one of the cost-effective solutions for determining high energy conversion efficiencies. Efficient photon management allows improving light incoupling in solar cells by reducing optical losses. The optics relies upon the interface morphology, and consequently, the growth mechanism of the top cell on the bottom cell is crucial for the implementation of efficient perovskite/silicon tandem solar cells. To describe the interface morphologies of perovskite/silicon tandem solar cells, a three-dimensional surface algorithm is used that allows investigating the perovskite solar cells deposited on the textured crystalline silicon solar cells. We distinguish between two extreme cases in which the film grows only in the direction of the substrate normal or in the direction of the local surface normal. The growth mode has significant influence on the film roughness, the effective thickness of the film, the optics of the solar cell, and
the photovoltaic parameters. The optics is investigated by finite-difference time-domain simulations. The influence of the interface morphology on the photovoltaic parameters is discussed, and guidelines are provided to reach high short-circuit current density and energy conversion efficiency.
PB  - American Chemical Society (ACS)
T2  - ACS Applied Materials and Interfaces
T1  - Influence of Perovskite Interface Morphology on the Photon Management in Perovskite/Silicon Tandem Solar Cells
VL  - 12
IS  - 13
SP  - 15080
EP  - 15086
DO  - 10.1021/acsami.9b21985
ER  - 

@article{
author = "Qarony, Wayesh and Hossain, Mohammad I. and Jovanov, Vladislav and Salleo, Alberto and Knipp, Dietmar and Tsang, Yuen Hong",
year = "2020",
abstract = "Perovskite/silicon tandem solar cells are considered as one of the cost-effective solutions for determining high energy conversion efficiencies. Efficient photon management allows improving light incoupling in solar cells by reducing optical losses. The optics relies upon the interface morphology, and consequently, the growth mechanism of the top cell on the bottom cell is crucial for the implementation of efficient perovskite/silicon tandem solar cells. To describe the interface morphologies of perovskite/silicon tandem solar cells, a three-dimensional surface algorithm is used that allows investigating the perovskite solar cells deposited on the textured crystalline silicon solar cells. We distinguish between two extreme cases in which the film grows only in the direction of the substrate normal or in the direction of the local surface normal. The growth mode has significant influence on the film roughness, the effective thickness of the film, the optics of the solar cell, and
the photovoltaic parameters. The optics is investigated by finite-difference time-domain simulations. The influence of the interface morphology on the photovoltaic parameters is discussed, and guidelines are provided to reach high short-circuit current density and energy conversion efficiency.",
publisher = "American Chemical Society (ACS)",
journal = "ACS Applied Materials and Interfaces",
title = "Influence of Perovskite Interface Morphology on the Photon Management in Perovskite/Silicon Tandem Solar Cells",
volume = "12",
number = "13",
pages = "15080-15086",
doi = "10.1021/acsami.9b21985"
}

Qarony, W., Hossain, M. I., Jovanov, V., Salleo, A., Knipp, D.,& Tsang, Y. H.. (2020). Influence of Perovskite Interface Morphology on the Photon Management in Perovskite/Silicon Tandem Solar Cells. in ACS Applied Materials and Interfaces
American Chemical Society (ACS)., 12(13), 15080-15086.
https://doi.org/10.1021/acsami.9b21985

Qarony W, Hossain MI, Jovanov V, Salleo A, Knipp D, Tsang YH. Influence of Perovskite Interface Morphology on the Photon Management in Perovskite/Silicon Tandem Solar Cells. in ACS Applied Materials and Interfaces. 2020;12(13):15080-15086.
doi:10.1021/acsami.9b21985 .

Qarony, Wayesh, Hossain, Mohammad I., Jovanov, Vladislav, Salleo, Alberto, Knipp, Dietmar, Tsang, Yuen Hong, "Influence of Perovskite Interface Morphology on the Photon Management in Perovskite/Silicon Tandem Solar Cells" in ACS Applied Materials and Interfaces, 12, no. 13 (2020):15080-15086,
https://doi.org/10.1021/acsami.9b21985 . .

TY  - JOUR
AU  - Hossain, Mohammad I.
AU  - Qarony, Wayesh
AU  - Jovanov, Vladislav
AU  - Tsang, Yuen H.
AU  - Knipp, Dietmar
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6875
AB  - The perovskite material system allows for the realization of perovskite/silicon tandem solar cells with high energy conversion efficiencies at low cost. To realize such solar cells, the device geometry, the device processing, and the contact materials have to be modified in comparison to single junction perovskite solar cells. In this study, perovskite/silicon tandem solar cells are designed allowing for the generation of short-circuit current densities and energy conversion efficiencies exceeding 20 mA cm−2 and 30%, while using realistic device structures. High short-circuit current densities can be achieved by minimizing reflection losses and optical losses of the contact layers. A hybrid approach is used to investigate the optics by combining finite-difference time-domain simulations with experimental measurements. Details on the nanophotonic design will be provided and discussed.
PB  - Royal Society of Chemistry
T2  - Journal of Materials Chemistry A
T1  - Nanophotonic design of perovskite/silicon tandem solar cells
VL  - 6
IS  - 8
SP  - 3625
EP  - 3633
DO  - 10.1039/C8TA00628H
ER  - 

@article{
author = "Hossain, Mohammad I. and Qarony, Wayesh and Jovanov, Vladislav and Tsang, Yuen H. and Knipp, Dietmar",
year = "2018",
abstract = "The perovskite material system allows for the realization of perovskite/silicon tandem solar cells with high energy conversion efficiencies at low cost. To realize such solar cells, the device geometry, the device processing, and the contact materials have to be modified in comparison to single junction perovskite solar cells. In this study, perovskite/silicon tandem solar cells are designed allowing for the generation of short-circuit current densities and energy conversion efficiencies exceeding 20 mA cm−2 and 30%, while using realistic device structures. High short-circuit current densities can be achieved by minimizing reflection losses and optical losses of the contact layers. A hybrid approach is used to investigate the optics by combining finite-difference time-domain simulations with experimental measurements. Details on the nanophotonic design will be provided and discussed.",
publisher = "Royal Society of Chemistry",
journal = "Journal of Materials Chemistry A",
title = "Nanophotonic design of perovskite/silicon tandem solar cells",
volume = "6",
number = "8",
pages = "3625-3633",
doi = "10.1039/C8TA00628H"
}

Hossain, M. I., Qarony, W., Jovanov, V., Tsang, Y. H.,& Knipp, D.. (2018). Nanophotonic design of perovskite/silicon tandem solar cells. in Journal of Materials Chemistry A
Royal Society of Chemistry., 6(8), 3625-3633.
https://doi.org/10.1039/C8TA00628H

Hossain MI, Qarony W, Jovanov V, Tsang YH, Knipp D. Nanophotonic design of perovskite/silicon tandem solar cells. in Journal of Materials Chemistry A. 2018;6(8):3625-3633.
doi:10.1039/C8TA00628H .

Hossain, Mohammad I., Qarony, Wayesh, Jovanov, Vladislav, Tsang, Yuen H., Knipp, Dietmar, "Nanophotonic design of perovskite/silicon tandem solar cells" in Journal of Materials Chemistry A, 6, no. 8 (2018):3625-3633,
https://doi.org/10.1039/C8TA00628H . .

TY  - JOUR
AU  - Tamang, Asman
AU  - Sai, Hitoshi
AU  - Jovanov, Vladislav
AU  - Matsubara, Koji
AU  - Knipp, Dietmar
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6874
AB  - A new device design of microcrystalline silicon thin-film solar cell allows for approaching the geometric light-trapping limit. The solar cell is based on triangular textured surfaces in combination with optimized front and back contacts with very low optical losses. In comparison to crystalline silicon solar cells with record energy conversion efficiency the material usage of the thin-film solar cells is reduced to 1–2%, while exhibiting the potential to achieve short circuit current densities of more than 80% of their counterparts. The short circuit current density of the thin-film solar cells is approaching the geometric light-trapping limit commonly known as the Yablonovitch limit under perpendicular incidence. The design of the solar cell is described considering the electrical and optical properties of the textured solar cell.
PB  - American Chemical Society (ACS)
T2  - ACS Photonics
T1  - Silicon Thin-Film Solar Cells Approaching the Geometric Light-Trapping Limit: Surface Texture Inspired by Self-Assembly Processes
VL  - 5
IS  - 7
SP  - 2799
EP  - 2806
DO  - 10.1021/acsphotonics.7b01397
ER  - 

@article{
author = "Tamang, Asman and Sai, Hitoshi and Jovanov, Vladislav and Matsubara, Koji and Knipp, Dietmar",
year = "2018",
abstract = "A new device design of microcrystalline silicon thin-film solar cell allows for approaching the geometric light-trapping limit. The solar cell is based on triangular textured surfaces in combination with optimized front and back contacts with very low optical losses. In comparison to crystalline silicon solar cells with record energy conversion efficiency the material usage of the thin-film solar cells is reduced to 1–2%, while exhibiting the potential to achieve short circuit current densities of more than 80% of their counterparts. The short circuit current density of the thin-film solar cells is approaching the geometric light-trapping limit commonly known as the Yablonovitch limit under perpendicular incidence. The design of the solar cell is described considering the electrical and optical properties of the textured solar cell.",
publisher = "American Chemical Society (ACS)",
journal = "ACS Photonics",
title = "Silicon Thin-Film Solar Cells Approaching the Geometric Light-Trapping Limit: Surface Texture Inspired by Self-Assembly Processes",
volume = "5",
number = "7",
pages = "2799-2806",
doi = "10.1021/acsphotonics.7b01397"
}

Tamang, A., Sai, H., Jovanov, V., Matsubara, K.,& Knipp, D.. (2018). Silicon Thin-Film Solar Cells Approaching the Geometric Light-Trapping Limit: Surface Texture Inspired by Self-Assembly Processes. in ACS Photonics
American Chemical Society (ACS)., 5(7), 2799-2806.
https://doi.org/10.1021/acsphotonics.7b01397

Tamang A, Sai H, Jovanov V, Matsubara K, Knipp D. Silicon Thin-Film Solar Cells Approaching the Geometric Light-Trapping Limit: Surface Texture Inspired by Self-Assembly Processes. in ACS Photonics. 2018;5(7):2799-2806.
doi:10.1021/acsphotonics.7b01397 .

Tamang, Asman, Sai, Hitoshi, Jovanov, Vladislav, Matsubara, Koji, Knipp, Dietmar, "Silicon Thin-Film Solar Cells Approaching the Geometric Light-Trapping Limit: Surface Texture Inspired by Self-Assembly Processes" in ACS Photonics, 5, no. 7 (2018):2799-2806,
https://doi.org/10.1021/acsphotonics.7b01397 . .

TY  - JOUR
AU  - Jovanov, Vladislav
AU  - Stiebig, Helmut
AU  - Knipp, Dietmar
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6873
AB  - Vertically integrated color sensors with plasmonic reflectors are realized. The complete color information is detected at each color pixel of the sensor array without using optical filters. The spectral responsivity of the sensor is tuned by the applied electric bias and the design of the plasmonic reflector. By introducing an interlayer between the lossy metal back reflector and the sensor, the reflectivity can be modified over a wide spectral range. The detection principle is demonstrated for a silicon thin film detector prepared on a textured silver back reflector. The sensor can be used for RGB color detection replacing conventional color sensors with optical filters. Combining detectors with different spectral reflectivity of the back reflector allows for the realization of multispectral color sensors covering the visible and the near-infrared spectral range.
PB  - American Chemical Society (ACS)
T2  - ACS Photonics
T1  - Tunable Multispectral Color Sensor with Plasmonic Reflector
VL  - 5
IS  - 2
SP  - 378
EP  - 383
DO  - 10.1021/acsphotonics.7b00402
ER  - 

@article{
author = "Jovanov, Vladislav and Stiebig, Helmut and Knipp, Dietmar",
year = "2018",
abstract = "Vertically integrated color sensors with plasmonic reflectors are realized. The complete color information is detected at each color pixel of the sensor array without using optical filters. The spectral responsivity of the sensor is tuned by the applied electric bias and the design of the plasmonic reflector. By introducing an interlayer between the lossy metal back reflector and the sensor, the reflectivity can be modified over a wide spectral range. The detection principle is demonstrated for a silicon thin film detector prepared on a textured silver back reflector. The sensor can be used for RGB color detection replacing conventional color sensors with optical filters. Combining detectors with different spectral reflectivity of the back reflector allows for the realization of multispectral color sensors covering the visible and the near-infrared spectral range.",
publisher = "American Chemical Society (ACS)",
journal = "ACS Photonics",
title = "Tunable Multispectral Color Sensor with Plasmonic Reflector",
volume = "5",
number = "2",
pages = "378-383",
doi = "10.1021/acsphotonics.7b00402"
}

Jovanov, V., Stiebig, H.,& Knipp, D.. (2018). Tunable Multispectral Color Sensor with Plasmonic Reflector. in ACS Photonics
American Chemical Society (ACS)., 5(2), 378-383.
https://doi.org/10.1021/acsphotonics.7b00402

Jovanov V, Stiebig H, Knipp D. Tunable Multispectral Color Sensor with Plasmonic Reflector. in ACS Photonics. 2018;5(2):378-383.
doi:10.1021/acsphotonics.7b00402 .

Jovanov, Vladislav, Stiebig, Helmut, Knipp, Dietmar, "Tunable Multispectral Color Sensor with Plasmonic Reflector" in ACS Photonics, 5, no. 2 (2018):378-383,
https://doi.org/10.1021/acsphotonics.7b00402 . .

TY  - JOUR
AU  - Jovanov, Vladislav
AU  - Shrestha, Shailesh
AU  - Hüpkes, Jürgen
AU  - Ermes, Markus
AU  - Bittkau, Karsten
AU  - Knipp, Dietmar
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6876
AB  - The influence of film formation on light-trapping properties of silicon thin-film solar cells prepared on randomly textured substrates was studied. Realistic interface morphologies were calculated with a three-dimensional (3D) surface coverage algorithm using the measured substrate morphology and nominal film thicknesses of the individual layers as input parameters. Calculated interface morphologies were used in finite-difference time-domain simulations to determine the quantum efficiency and absorption in the individual layers of the thin-film solar cells. The investigation shows that a realistic description of interface morphologies is required to accurately predict the light-trapping properties of randomly textured silicon thin-film solar cells.
PB  - The Japan Society of Applied Physics
T2  - Applied Physics Express
T1  - Influence of film formation on light-trapping properties of randomly textured silicon thin-film solar cells
VL  - 7
IS  - 8
SP  - 082301
DO  - 10.7567/APEX.7.082301
ER  - 

@article{
author = "Jovanov, Vladislav and Shrestha, Shailesh and Hüpkes, Jürgen and Ermes, Markus and Bittkau, Karsten and Knipp, Dietmar",
year = "2014",
abstract = "The influence of film formation on light-trapping properties of silicon thin-film solar cells prepared on randomly textured substrates was studied. Realistic interface morphologies were calculated with a three-dimensional (3D) surface coverage algorithm using the measured substrate morphology and nominal film thicknesses of the individual layers as input parameters. Calculated interface morphologies were used in finite-difference time-domain simulations to determine the quantum efficiency and absorption in the individual layers of the thin-film solar cells. The investigation shows that a realistic description of interface morphologies is required to accurately predict the light-trapping properties of randomly textured silicon thin-film solar cells.",
publisher = "The Japan Society of Applied Physics",
journal = "Applied Physics Express",
title = "Influence of film formation on light-trapping properties of randomly textured silicon thin-film solar cells",
volume = "7",
number = "8",
pages = "082301",
doi = "10.7567/APEX.7.082301"
}

Jovanov, V., Shrestha, S., Hüpkes, J., Ermes, M., Bittkau, K.,& Knipp, D.. (2014). Influence of film formation on light-trapping properties of randomly textured silicon thin-film solar cells. in Applied Physics Express
The Japan Society of Applied Physics., 7(8), 082301.
https://doi.org/10.7567/APEX.7.082301

Jovanov V, Shrestha S, Hüpkes J, Ermes M, Bittkau K, Knipp D. Influence of film formation on light-trapping properties of randomly textured silicon thin-film solar cells. in Applied Physics Express. 2014;7(8):082301.
doi:10.7567/APEX.7.082301 .

Jovanov, Vladislav, Shrestha, Shailesh, Hüpkes, Jürgen, Ermes, Markus, Bittkau, Karsten, Knipp, Dietmar, "Influence of film formation on light-trapping properties of randomly textured silicon thin-film solar cells" in Applied Physics Express, 7, no. 8 (2014):082301,
https://doi.org/10.7567/APEX.7.082301 . .