CuInSe2 Quantum Dot Solar Cells with High Open-Circuit Voltage

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• 作者：Matthew G. Panthani ; C. Jackson Stolle ; Dariya K. Reid ; Dong Joon Rhee ; Taylor B. Harvey ; Vahid A. Akhavan ; Yixuan Yu ; Brian A. Korgel
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2013
• 出版时间：June 20, 2013
• 年：2013
• 卷：4
• 期：12
• 页码：2030-2034
• 全文大小：377K
• 年卷期：v.4,no.12(June 20, 2013)
• ISSN：1948-7185

文摘

CuInSe₂ (CISe) quantum dots (QDs) were synthesized with tunable size from less than 2 to 7 nm diameter. Nanocrystals were made using a secondary phosphine selenide as the Se source, which, compared to tertiary phosphine selenide precursors, was found to provide higher product yields and smaller nanocrystals that elicit quantum confinement with a size-dependent optical gap. Photovoltaic devices fabricated from spray-cast CISe QD films exhibited large, size-dependent, open-circuit voltages, up to 849 mV for absorber films with a 1.46 eV optical gap, suggesting that midgap trapping does not dominate the performance of these CISe QD solar cells.

Keywords:

CuInSe₂; quantum dots; quantum dot solar cell; photovoltaic; solar energy; midgap trapping; open-circuit voltage