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Proceedings Paper

Enhanced sensitivity to near-infrared with high fill factor in small molecular organic solar cells
Author(s): Hyun-Sub Shim; Hyo Jung Kim; Ji Whan Kim; Sei-Yong Kim; Won-Ik Jeong; Tae-Min Kim; Jang-Joo Kim
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Paper Abstract

High efficiency near-infrared (NIR) absorbing solar cells based on lead phthalocyanine (PbPc) are reported using copper iodide (CuI) as a templating layer to control the crystal structure of PbPc. Devices with CuI inserted between the ITO and PbPc layers exhibit a two times enhancement of the JSC compared to the case in the absence of the CuI layer. This is due to the increase of crystallinity in the molecules grown on the CuI templating layer, which is investigated via an x-ray diffraction study. Moreover, fill factor is also enhanced to 0.63 from 0.57 due to low series resistance although the additional CuI layer is inserted between the ITO and the PbPc layer. As a result, the corrected power conversion efficiency of 2.5% was obtained, which is the highest one reported up to now among the PbPc based solar cells.

Paper Details

Date Published: 13 September 2012
PDF: 5 pages
Proc. SPIE 8477, Organic Photovoltaics XIII, 84771M (13 September 2012); doi: 10.1117/12.930244
Show Author Affiliations
Hyun-Sub Shim, Seoul National Univ. (Korea, Republic of)
Hyo Jung Kim, Seoul National Univ. (Korea, Republic of)
Ji Whan Kim, Seoul National Univ. (Korea, Republic of)
Sei-Yong Kim, Seoul National Univ. (Korea, Republic of)
Won-Ik Jeong, Seoul National Univ. (Korea, Republic of)
Tae-Min Kim, Seoul National Univ. (Korea, Republic of)
Jang-Joo Kim, Seoul National Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 8477:
Organic Photovoltaics XIII
Zakya H. Kafafi; Christoph J. Brabec; Paul A. Lane, Editor(s)

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