Journal
ACS ENERGY LETTERS
Volume 5, Issue 7, Pages 2335-2342Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.0c01136
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Funding
- National Key Research Projects [2016YFA0202402]
- Natural Science Foundation of Jiangsu Province of China [BK20170337]
- National Natural Science Foundation of China [51761145013, 51803144, 61674111]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX19_1918]
- China Postdoctoral Science Foundation [2019M651942]
- 111 projects
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We have successfully demonstrated the effect of a thin organic bulk-heterojunction (BHJ) interlayer on improving the photovoltaic performance of lead sulfide (PbS) colloidal quantum dot (CQD) solar cells. Multiple organic BHJ films with PTB7-Th blending with various N-type acceptors have been introduced as hole-transporting layer (HTL) in PbS solar cells. Significant enhancement in V-oc was achieved in the hybrid devices compared to devices based on conventional HTLs like 1,2-ethanedithiol-treated PbS. Systematic characterizations reveal that the hybrid CQD/organic BHJ architecture can effectively modulate the interfacial charge dynamics and lead to enhanced external quantum efficiency, resulting in a champion efficiency of 12.02%. Solution-processed hybrid CQD/organic architecture may become a universal approach to improve the photovoltaic performance and scalability of PbS CQD solar cells.
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