標題: Enhanced carrier extraction efficiency in organic solar cells with reduced space-charge limited transport by engineered vertical compositional profile
作者: Lee, Ming-Kun
Kuo, Tsung-Han
Kong, Kuo-Wen
Hong, Yun-Ru
Wang, Jen-Chun
Horng, Sheng-Fu
Meng, Hsin-Fei
物理研究所
Institute of Physics
關鍵字: Polymer solar cells;Space-charge limited effect;Fillfactor;Layer thickness;Light bias;Quantum efficiency
公開日期: 1-十二月-2012
摘要: A multi-layered polymer solar cell (PSC) with a graded compositional profile to reduce space-charge limited (SCL) transport was designed and analyzed in details. We found that by increasing the effective carrier lifetime for the slower photo-carriers. SCL effects that degrade the fill factor and the power conversion efficiency can be alleviated in PSCs with a thick active layer. The reduction of SCL effects was evidenced by a diminished dependence of the incident photon-to-electron conversion efficiency (IPCE) on light bias, which also indicates the importance of light bias in characterizing the operating IPCE of PSCs with thick active layers which operate in SCL region. Based on our results, device architecture to enhance FF was proposed. (C) 2012 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.synthmet.2012.09.007
http://hdl.handle.net/11536/20596
ISSN: 0379-6779
DOI: 10.1016/j.synthmet.2012.09.007
期刊: SYNTHETIC METALS
Volume: 162
Issue: 21-22
起始頁: 1930
結束頁: 1935
顯示於類別:期刊論文


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