Tandem and Triple-Junction Polymer:Nanocrystal Hybrid Solar Cells Consisting of Identical Subcells

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• 作者：Haipeng Lu ; Andrew N. Bartynski ; Matthew J. Greaney ; Mark E. Thompson ; Richard L. Brutchey
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：October 22, 2014
• 年：2014
• 卷：6
• 期：20
• 页码：18306-18311
• 全文大小：339K
• ISSN：1944-8252

文摘

Tandem and triple-junction polymer:nanocrystal hybrid solar cells with identical subcells based on P3HT:CdSe nanocrystal bulk heterojunctions (BHJs) are reported for the first time showing 2-fold and 3-fold increases of open-circuit voltage (V_OC), respectively, relative to the single-junction cell. A combination of nanocrystalline ZnO and pH-neutral PEDOT:PSS is used as the interconnecting layer, and the thicknesses of subcells are optimized with the guidance of optical simulations. As a result, the average power conversion efficiency (PCE) exhibits a significant increase from 2.0% (V_OC = 0.57 V) in single-junction devices to 2.7% (champion 3.1%, V_OC = 1.28 V) in tandem devices and 2.3% (V_OC = 1.98 V) in triple-junction devices.

Keywords:

tandem solar cell; hybrid solar cell; P3HT; CdSe; optical simulation