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Materials 2016, 9(8), 667; doi:10.3390/ma9080667

Investigation of Various Active Layers for Their Performance on Organic Solar Cells

1
Institute of Microelectronics, Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
2
Department of Applied Physics, National University of Kaohsiung, Nanzih, Kaohsiung 81148, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Teen-Hang Meen
Received: 27 June 2016 / Revised: 29 July 2016 / Accepted: 1 August 2016 / Published: 9 August 2016
(This article belongs to the Special Issue Selected Papers from ICASI 2016)
View Full-Text   |   Download PDF [2225 KB, uploaded 9 August 2016]   |  

Abstract

The theoretical mechanism of open-circuit voltages (VOC) in OSCs based on various small molecule organic materials is studied. The structure under investigation is simple planar heterojunction (PHJ) by thermal vacuum evaporation deposition. The various wide band gaps of small molecule organic materials are used to enhance the power conversion efficiency (PCE). The donor materials used in the device include: Alpha-sexithiophene (α-6T), Copper(II) phthalocyanine (CuPc), boron subnaphthalocyanine chloride (SubNc) and boron Subphthalocyanine chloride (SubPc). It is combined with fullerene or SubPc acceptor material to obtain a comprehensive understanding of the charge transport behavior. It is found that the VOC of the device is largely limited by charge transport. This was associated with the space charge effects and hole accumulation. These results are attributed to the improvement of surface roughness and work function after molybdenum trioxide (MoO3) is inserted as an anode buffer layer. View Full-Text
Keywords: small molecule organic solar cells; open-circuit voltages; thermal vacuum evaporation deposition small molecule organic solar cells; open-circuit voltages; thermal vacuum evaporation deposition
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Huang, P.-H.; Wang, Y.-H.; Ke, J.-C.; Huang, C.-J. Investigation of Various Active Layers for Their Performance on Organic Solar Cells. Materials 2016, 9, 667.

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