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Proceedings Paper

Efficiency improvement by near infrared quantum dots for luminescent solar concentrators
Author(s): Chunhua Wang; Georgiy Shcherbatyuk; Richard Inman; Dave Pelka; Weiya Zhang; Yvonne Rodriguez; Sue Carter; Roland Winston; Sayantani Ghosh
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Paper Abstract

Quantum dot (QD) luminescent solar concentrator (LSC) uses a sheet of highly transparent materials doped with luminescent QDs materials. Sunlight is absorbed by these quantum dots and emitted through down conversion process. The emitted light is trapped in the sheet and travels to the edges where it can be collected by photovoltaic solar cells. In this study, we investigate the performance of LSCs fabricated with near infrared QDs (lead sulfide) and compared with the performance of LSCs containing normal visible QDs (CdSe/ZnS), and LSCs containing organic dye (Rhodamine B). Effects of materials concentrations (related to re-absorption) on the power conversion efficiency are also analyzed. The results show that near infrared QDs LSCs can generate nearly twice as much as the output current from normal QDs and organic dye LSCs. This is due to their broad absorption spectra. If stability of QDs is further improved, the near infrared QDs will dramatically improve the efficiency of LSCs for solar energy conversion with lower cost per Wp.

Paper Details

Date Published: 19 August 2010
PDF: 6 pages
Proc. SPIE 7772, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion, 77720G (19 August 2010); doi: 10.1117/12.860094
Show Author Affiliations
Chunhua Wang, Univ. of California, Merced (United States)
Georgiy Shcherbatyuk, Univ. of California, Merced (United States)
Richard Inman, Univ. of California, Merced (United States)
Dave Pelka, Pelka & Associates Inc. (United States)
Weiya Zhang, Univ. of California, Merced (United States)
Yvonne Rodriguez, Univ. of California, Santa Cruz (United States)
Sue Carter, Univ. of California, Santa Cruz (United States)
Roland Winston, Univ. of California, Merced (United States)
Sayantani Ghosh, Univ. of California, Merced (United States)


Published in SPIE Proceedings Vol. 7772:
Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion
Loucas Tsakalakos, Editor(s)

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