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Vol. 7 No. 4 (2015)

Novel Hybrid Ligands for Passivating PbS Colloidal Quantum Dots to Enhance the Performance of Solar Cells

https://doi.org/10.1007/s40820-015-0046-4
Yuehua Yang
State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, People’s Republic of China
Baofeng Zhao
State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, People’s Republic of China
Yuping Gao
State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, People’s Republic of China
Han Liu
State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, People’s Republic of China
Yiyao Tian
State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, People’s Republic of China
Donghuan Qin
State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, People’s Republic of China
Hongbin Wu
State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, People’s Republic of China
Wenbo Huang
State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, People’s Republic of China
Lintao Hou
Siyuan Laboratory, Department of Physics, Jinan University, Guangzhou 510632, People’s Republic of China

Corresponding Author: Donghuan Qin

qindh@scut.edu.cn

Nano-Micro Letters, Vol. 7 No. 4 (2015), Article Number: 325-331

Abstract

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.

Keywords

PbS Colloidal quantum dot Solar cells Ligands
Yang, Yuehua, Baofeng Zhao, Yuping Gao, Han Liu, Yiyao Tian, Donghuan Qin, Hongbin Wu, Wenbo Huang, and Lintao Hou. 2015. “Novel Hybrid Ligands for Passivating PbS Colloidal Quantum Dots to Enhance the Performance of Solar Cells”. Nano-Micro Letters 7 (4):325-31. https://doi.org/10.1007/s40820-015-0046-4.
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