Simulation of high efficiency InGaP/InP tandem solar cells under flat plate and concentrator conditions
2017 International conference on Microelectronic Devices, Circuits and Systems (ICMDCS)
Abstract:
Multi-junction solar cells based on III-V materials are widely utilized for space applications owing to their light weight and very high efficiency. When used for terrestrial applications, they are used in concentrator systems to boost the efficiency and reduce the effective solar cell area to enhance the performance-to-cost ratio. However, the efficiency drops as the light intensity goes beyond a certain value mainly because of the sharp drop in fill factor. In this study, InP and InGaP were designed to be the bottom and top cell absorbers for multi-junction architecture. Effects of variation of Ga mole fraction in InGaP and the top cell absorber thickness on the overall electrical performance of the solar cell were simulated in SILVACO TCAD software. When used in the concentrator conditions, the maximum efficiency of 28.4076% was obtained under 2 suns and efficiency was found to drop drastically at higher intensities.
Band Tail States in FAPbI3: Characterization and Simulation
Fundacio Scito (2017)
A generic interface to reduce the efficiency-stability-cost gap of perovskite solar cells
Science American Association for the Advancement of Science 358:6367 (2017) 1192-1197
Abstract:
A major bottleneck delaying the further commercialization of thin-film solar cells based on hybrid organohalide lead perovskites is interface loss in state-of-the-art devices. We present a generic interface architecture that combines solution-processed, reliable, and cost-efficient hole-transporting materials without compromising efficiency, stability, or scalability of perovskite solar cells. Tantalum-doped tungsten oxide (Ta-WO x )/conjugated polymer multilayers offer a surprisingly small interface barrier and form quasi-ohmic contacts universally with various scalable conjugated polymers. In a simple device with regular planar architecture and a self-assembled monolayer, Ta-WO x -doped interface-based perovskite solar cells achieve maximum efficiencies of 21.2% and offer more than 1000 hours of light stability. By eliminating additional ionic dopants, these findings open up the entire class of organics as scalable hole-transporting materials for perovskite solar cells.A generic interface to reduce the efficiency-stability-cost gap of perovskite solar cells.
Science (New York, N.Y.) 358:6367 (2017) 1192-1197
Abstract:
A major bottleneck delaying the further commercialization of thin-film solar cells based on hybrid organohalide lead perovskites is interface loss in state-of-the-art devices. We present a generic interface architecture that combines solution-processed, reliable, and cost-efficient hole-transporting materials without compromising efficiency, stability, or scalability of perovskite solar cells. Tantalum-doped tungsten oxide (Ta-WO x )/conjugated polymer multilayers offer a surprisingly small interface barrier and form quasi-ohmic contacts universally with various scalable conjugated polymers. In a simple device with regular planar architecture and a self-assembled monolayer, Ta-WO x -doped interface-based perovskite solar cells achieve maximum efficiencies of 21.2% and offer more than 1000 hours of light stability. By eliminating additional ionic dopants, these findings open up the entire class of organics as scalable hole-transporting materials for perovskite solar cells.Efficient benzodithiophene and thienopyrroledione containing random polymers as components for organic solar cells
Polymer Elsevier 133 (2017) 60-67