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2026, Vol: 15, Issue: 1
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Technical Note
Online Published: 22 Apr 2025
 


InGaP/InGaAs/Ge multi-junction solar cells efficiency improvements using interposed transport layers

Kossivi A. Donkata, Daniel T. Cotfas, Petru A. Cotfas, Katawoura Beltako, Milohum M. Dzagli.


Abstract
The high conversion efficiency of solar cells can make them more competitive in cost compared to conventional energy sources. Therefore, enhancing photovoltaic cell efficiency remains a critical challenge for researchers and manufacturers. Shockley-Queisser single junction photovoltaic cells are limited to 33.7%, and multi-junction solar cells are the most promising technologies that have achieved remarkable efficiencies exceeding 46%. Modeling and simulation are essential to optimize semiconductor devices and reduce their development time and cost. This study investigates the performance improvement of novel InGaP/InGaAs/Ge triple-junction solar cells by integrating III-V semiconductors. The design includes Tungsten disulfide as an electron transport layer, reduced graphene oxide as a hole transport layer, and intrinsic InGaAs layers to improve efficiency in decreasing the number of InGaP, InGaAs, and Ge layers to reduce manufacturing costs. SCAPS 1D software was used to simulate under a solar irradiance of 1000 Wm-2 and an air mass of AM1.5G spectrum at 25°C. In addition, a commercial InGaP/InGaAs/Ge solar cell and a mini-solar panel were also simulated, and the obtained current-voltage characteristics were compared with experimental data. A strong correlation was observed between the simulated data and the experimental measurements, confirming the proposed solar cell design's potential, accuracy, and reliability. The new structure produced an impressive power conversion efficiency of 49.83%. The findings suggest a route to manufacturing new multi-junction photovoltaic cells with high efficiency and lower cost.

Key words: III-V semiconductor, multi-junction solar cell, ETL WS2, HTL rGO, SCAPS 1D


 
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How to Cite this Article
Pubmed Style

Donkata KA, Cotfas DT, Cotfas PA, Beltako K, Dzagli MM. InGaP/InGaAs/Ge multi-junction solar cells efficiency improvements using interposed transport layers. Sol. Energy Sustain. Dev.. 2025; 14(1): 316-333.

doi:10.51646/jsesd.v14i1.338

Web Style

Donkata KA, Cotfas DT, Cotfas PA, Beltako K, Dzagli MM. InGaP/InGaAs/Ge multi-junction solar cells efficiency improvements using interposed transport layers. https://www.jsesd.org/?mno=302658349 [Access: November 12, 2026].

doi:10.51646/jsesd.v14i1.338

AMA (American Medical Association) Style

Donkata KA, Cotfas DT, Cotfas PA, Beltako K, Dzagli MM. InGaP/InGaAs/Ge multi-junction solar cells efficiency improvements using interposed transport layers. Sol. Energy Sustain. Dev.. 2025; 14(1): 316-333.


doi:10.51646/jsesd.v14i1.338

Vancouver/ICMJE Style

Donkata KA, Cotfas DT, Cotfas PA, Beltako K, Dzagli MM. InGaP/InGaAs/Ge multi-junction solar cells efficiency improvements using interposed transport layers. Sol. Energy Sustain. Dev.. (2025), [cited November 12, 2026]; 14(1): 316-333.


doi:10.51646/jsesd.v14i1.338

Harvard Style

Donkata, K. A., Cotfas, . D. T., Cotfas, . P. A., Beltako, . K. & Dzagli, . M. M. (2025) InGaP/InGaAs/Ge multi-junction solar cells efficiency improvements using interposed transport layers. Sol. Energy Sustain. Dev., 14 (1), 316-333.


doi:10.51646/jsesd.v14i1.338

Turabian Style

Donkata, Kossivi A., Daniel T. Cotfas, Petru A. Cotfas, Katawoura Beltako, and Milohum M. Dzagli. 2025. InGaP/InGaAs/Ge multi-junction solar cells efficiency improvements using interposed transport layers. Solar Energy and Sustainable Development, 14 (1), 316-333.


doi:10.51646/jsesd.v14i1.338

Chicago Style

Donkata, Kossivi A., Daniel T. Cotfas, Petru A. Cotfas, Katawoura Beltako, and Milohum M. Dzagli. "InGaP/InGaAs/Ge multi-junction solar cells efficiency improvements using interposed transport layers." Solar Energy and Sustainable Development 14 (2025), 316-333.


doi:10.51646/jsesd.v14i1.338

MLA (The Modern Language Association) Style

Donkata, Kossivi A., Daniel T. Cotfas, Petru A. Cotfas, Katawoura Beltako, and Milohum M. Dzagli. "InGaP/InGaAs/Ge multi-junction solar cells efficiency improvements using interposed transport layers." Solar Energy and Sustainable Development 14.1 (2025), 316-333. Print.


doi:10.51646/jsesd.v14i1.338

APA (American Psychological Association) Style

Donkata, K. A., Cotfas, . D. T., Cotfas, . P. A., Beltako, . K. & Dzagli, . M. M. (2025) InGaP/InGaAs/Ge multi-junction solar cells efficiency improvements using interposed transport layers. Solar Energy and Sustainable Development, 14 (1), 316-333.


doi:10.51646/jsesd.v14i1.338

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