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Highly efficient inverted polymer solar cell by low temperature annealing of interlayer
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/content/aip/journal/apl/92/17/10.1063/1.2918983
2008-04-30
2014-08-23

Abstract

We demonstrate a highly efficient inverted bulk heterojunction polymersolar cell based on regioregular poly(3-hexylthiophene):[6,6]-phenyl butyric acid methyl ester with a low temperature annealed interfacial buffer layer, cesium carbonate . This approach improves the power conversion efficiency of the inverted cell from 2.3% to 4.2%, with short-circuit current of , open-circuit voltage of , and fill factor of 63% under AM1.5G irradiation. This result is comparable to the previous regular structure device on the same system. Ultraviolet photoelectron spectroscopy shows that the work function of annealed layer decreases from . Further x-ray photoelectron spectroscopy results reveal that can decompose into low work function,doped cesium oxide upon annealing, which is accountable for the work-function reduction and device efficiency improvement.

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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Highly efficient inverted polymer solar cell by low temperature annealing of Cs2CO3 interlayer
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/17/10.1063/1.2918983
10.1063/1.2918983
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