Current matching using cdse quantum dots to enhance the power conversion efficiency of ingap/gaas/ge tandem solar cells

Ya Ju Lee, Yung Chi Yao, Meng Tsan Tsai, An Fan Liu, Min De Yang, Jiun Tsuen Lai

研究成果: 雜誌貢獻期刊論文同行評審

12 引文 斯高帕斯(Scopus)

摘要

A III-V multi-junction tandem solar cell is the most efficient photovoltaic structure that offers an extremely high power conversion efficiency. Current mismatching between each subcell of the device, however, is a significant challenge that causes the experimental value of the power conversion efficiency to deviate from the theoretical value. In this work, we explore a promising strategy using CdSe quantum dots (QDs) to enhance the photocurrent of the limited subcell to match with those of the other subcells and to enhance the power conversion efficiency of InGaP/GaAs/Ge tandem solar cells. The underlying mechanism of the enhancement can be attributed to the QD’s unique capacity for photon conversion that tailors the incident spectrum of solar light; the enhanced efficiency of the device is therefore strongly dependent on the QD’s dimensions. As a result, by appropriately selecting and spreading 7 mg/mL of CdSe QDs with diameters of 4.2 nm upon the InGaP/GaAs/Ge solar cell, the power conversion efficiency shows an enhancement of 10.39% compared to the cell’s counterpart without integrating CdSe QDs.

原文英語
頁(從 - 到)A953-A963
期刊Optics Express
21
發行號106
DOIs
出版狀態已發佈 - 2013 十一月 4

ASJC Scopus subject areas

  • 原子與分子物理與光學

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