Numerical study of a highly efficient solar cell with graded band gap design

Ming Hsuan Tan, Hung Ruei Tseng, Chien Ting Kuo, Shun Chieh Hsu, Yen Hua Lo, Che Pin Tsai, Yuh Jen Cheng, Chien-Chung Lin

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Abstract

A linearly graded band gap design in the intrinsic layer of a p-i-n solar cell is studied numerically. An ideal model using Matlab®is built and the device performance is calculated using continuity equations and an effective band gap model under various band gap combinations. The power conversion efficiency (PCE) can be as high as 30.21%, while the abrupt junction reference device only exhibits 29.25% under the same parameters. This design is also evaluated using the commercial TCAD software APSYS®, and the calculations show optimal efficiency enhancements of about 1.14-fold that of the abrupt junction device in an AlAs/GaAs system and 2.05-fold that in an InGaN/GaN system.

Original languageEnglish
Article numbere054301
JournalJapanese Journal of Applied Physics
Volume54
Issue number5
DOIs
StatePublished - 1 Jan 2015

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    Tan, M. H., Tseng, H. R., Kuo, C. T., Hsu, S. C., Lo, Y. H., Tsai, C. P., Cheng, Y. J., & Lin, C-C. (2015). Numerical study of a highly efficient solar cell with graded band gap design. Japanese Journal of Applied Physics, 54(5), [e054301]. https://doi.org/10.7567/JJAP.54.054301