期刊
APPLIED PHYSICS LETTERS
卷 110, 期 10, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.4978444
关键词
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资金
- Alumnikring Den Haag/Rotterdam through the Ubbo Emmius Fund of the University of Groningen
- ERC Starting Grant Hybrids Solution Processable Optoelectronic Devices (Hy-SPOD) [ERC-306983]
- ERC Starting Grant NANOSOLID [306733]
- European Research Council (ERC) [306733] Funding Source: European Research Council (ERC)
Lead sulfide quantum dot (PbS QD) solar cell efficiencies have improved rapidly over the past years due in large part to intelligent band alignment considerations. A pn-junction can be formed by connecting PbS layers with contrasting ligands. However, the resulting doping concentrations are typically low and cannot be effectively controlled. Here, we present a method of chemically p-doping films of thiol capped PbS QDs. P-n junction solar cells with increased doping in the p-type layer show improved short circuit current and fill factor, leading to an improvement in the power conversion efficiency from 7.1% to 7.6%. By examining Schottky diodes, field effect transistors, and the absorption spectra of treated and untreated PbS QDs, we show that the improved efficiency is due to the increased doping concentration in the thiol capped QD layer and to denser packing of the PbS QD film. Published by AIP Publishing.
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