Quantum-Dot-Sensitized Solar Cell with Unprecedentedly High Photocurrent

Title
Quantum-Dot-Sensitized Solar Cell with Unprecedentedly High Photocurrent
Authors
이진욱손대용안태규신희원김인영황성주고민재설수환한혁수박남규
Keywords
Quantum Dot; Sensitized solar cell; photocurrent
Issue Date
2013-01
Publisher
Scientific Reports
Citation
VOL 3, 1050-1-1050-8
Abstract
The reported photocurrent density (JSC) of PbS quantum dot (QD)-sensitized solar cell was less than 19 mA/ cm2 despite the capability to generate 38 mA/㎠, which results from inefficient electron injection and fast charge recombination. Here, we report on a PbS:Hg QD-sensitized solar cell with an unprecedentedly high JSC of 30 mA/㎠. ByHg21 doping into PbS, JSC is almost doubled with improved stability. Femtosecond transient study confirms that the improved JSC is due to enhanced electron injection and suppressed charge recombination. EXAFS reveals that Pb-S bond is reinforced and structural disorder is reduced by interstitially incorporated Hg21, which is responsible for the enhanced electron injection, suppressed recombination and stability. Thanks to the extremely high JSC, power conversion efficiency of 5.6% is demonstrated at one sun illumination.
URI
http://pubs.kist.re.kr/handle/201004/44528
ISSN
20452322
Appears in Collections:
KIST Publication > Article
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