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期刊名称: Organic Electronics
Volume:12    Issue:4        Page:566-574
ISSN:1566-1199

ITO-free flexible polymer solar cells: From small model devices to roll-to-roll processed large modules期刊论文

作者: Manceau Matthieu Angmo Dechan Jørgensen Mikkel Krebs Frederik C
DOI:10.1016/j.orgel.2011.01.009

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页码: 566-574
被引频次: 189
出版者: Elsevier B.V,ELSEVIER SCIENCE BV
期刊名称: Organic Electronics
ISSN: 1566-1199
卷期: Volume:12    Issue:4
语言: English
摘要: Manufacturing of flexible ITO-free polymer solar cell modules by roll-to-roll methods (R2R) is described. Inverted devices with top illumination were built on a Kapton foil and an Aluminum/Chromium bi-layer system was used as electron contact. The layer structure was Kapton/Al/Cr/P3HT:PCBM/PEDOT:PSS/Ag (printed) and devices were encapsulated. Small area cells (3 cm(2) active area) were first carefully optimized investigating the influence of a number of discrete parameters on performance. A maximum power conversion efficiency of 1.4% was achieved under 1 sun illumination (AM 1.5G, 1000 W m(-2)). Optimized lab-scale single devices were then transferred to a full R2R process combining slot-die coating and screen printing. All the layers were processed from solution under ambient conditions. Two different concepts were explored: (i) serially connected stripe modules (to reduce the Ohmic losses) and (ii) monolithic modules (to achieve high geometric fill factor and increase the flexibility of the process). For this second concept, the only layer that needs to be patterned is the silver grid electrode and the grid pattern design can then be readily tuned. As an example, four different patterns were used and the resultant performances compared. Modules comprising 16 serially connected cells gave total area efficiencies up to 0.5% (235 cm(2) - 1% on the active area) while the best monolithic ones gave 0.35% (100 cm(2) - 0.4% on the active area). The freshly prepared devices consistently showed an inflection point in the IV curve indicative of a rather poor photovoltaic behavior. Upon light exposure and repeated IV scans the inflection point partially disappeared, and performance significantly increased. (C) 2011 Elsevier B.V. All rights reserved.
相关主题: Roll-to-roll processing, P3HT:PCBM, Polymer solar cells, Chromium/Aluminum, ITO-free, Monolithic, PHYSICS, APPLIED, MATERIALS SCIENCE, MULTIDISCIPLINARY, Solar cells, Polymer industry, Solar batteries, Polymers,

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