Efficient Charge Extraction in Thick Bulk Heterojunction Solar Cells through Infiltrated Diffusion Doping

Title
Efficient Charge Extraction in Thick Bulk Heterojunction Solar Cells through Infiltrated Diffusion Doping
Authors
김정환Kilho YuHeejoo KimSooncheol KwonGeunjin KimKyungchoon KwonKwanghee Lee
Issue Date
2014-06
Publisher
Advanced Energy Materials
Citation
VOL 4, NO 8-1301502-9
Abstract
A new strategy for improving the charge extraction in thick bulk heterojunction (BHJ) polymer solar cells (PSCs) is reported. By the deposition of a solution-processed vanadium oxide (s-VOx) onto BHJ active layers, conductive charge-transport channels are formed inside the active layer via a charge-transfer doping reaction between the lone-pair electrons of the sulfur atoms in the polymer and the Lewis-acidic vanadium atoms of the s-VOx. Because the charge-transport channels significantly reduce charge recombination in the BHJ films, high internal quantum efficiencies (IQEs) of over 80% are achieved in the thick inverted PSCs (approximate to 420 nm). This finding represents a new strategy for improving the efficiency and feasibility of printable photovoltaic devices.
URI
http://pubs.kist.re.kr/handle/201004/68199
ISSN
1614-6832
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KIST Publication > Article
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