A multilevel intermediate-band solar cell by InGaN/GaN quantum dots with a strain-modulated structure.

Sang, Liwen; Liao, Meiyong; Liang, Qifeng; Takeguchi, Masaki; Dierre, Benjamin; Shen, Bo; Sekiguchi, Takashi; Koide, Yasuo et al. · Adv Mater · 2014

basic_science · Level V

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Abstract

Multiple stacked InGaN/GaN quantum dots are embedded into an InGaN p-n junction to develop multilevel intermediateband (MIB) solar cells. An IB transition is evidenced from both experiment and theoretical calculations. The MIB solar cell shows a wide photovoltaic response from the UV to the near-IR region. This work opens up an interesting opportunity for high-efficiency IB solar cells in the photovoltaics field.