Optoelectronics Letters

, Volume 9, Issue 3, pp 177–180 | Cite as

An AlxIn1−xAs/GaAs heterojunction ultra-thin film solar cell with 20% efficiency



An ultra-thin film photovoltaic cell, which incorporates an AlxIn1−xAs/GaAs heterojunction, is simulated using Adept 1D simulation tool, and it is with an energy conversion efficiency of 20.06% (under 1 sun, AM1.5G illumination) for 604 nm cell thickness (excluding the substrate thickness), and optimized layer thickness and doping concentration for each layer of the device. The device has an n-type AlAs window layer (highly doped), an n-type AlxIn1−xAs emitter layer and a p-type GaAs base layer. Germanium (Ge) substrate is used for the structure. The device parameters are optimized separately for each layer. Based on these optimizations, the ultra-thin film solar cell design is proposed after careful consideration of lattice mismatch between two adjacent layers of the device.


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Copyright information

© Tianjin University of Technology and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Department of Electrical and Electronic EngineeringIslamic University of Technology Board BazarGazipurBangladesh

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