Journal
NANO-MICRO LETTERS
Volume 7, Issue 4, Pages 325-331Publisher
SHANGHAI JIAO TONG UNIV PRESS
DOI: 10.1007/s40820-015-0046-4
Keywords
PbS; Colloidal quantum dot; Solar cells; Ligands
Funding
- National Natural Science Foundation of China [91333206, 61274062, 11204106]
- National Science Foundation for Distinguished Young Scholars of China [51225301]
- Guangdong Province Natural Science Fund [2014A030313257]
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We developed novel hybrid ligands to passivate PbS colloidal quantum dots (CQDs), and two kinds of solar cells based on as-synthesized CQDs were fabricated to verify the passivation effects of the ligands. It was found that the ligands strongly affected the optical and electrical properties of CQDs, and the performances of solar cells were enhanced strongly. The optimized hybrid ligands, oleic amine/octyl-phosphine acid/CdCl2 improved power conversion efficiency (PCE) to much higher of 3.72 % for Schottky diode cell and 5.04 % for p-n junction cell. These results may be beneficial to design passivation strategy for low-cost and high-performance CQDs solar cells.
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