All-solid-state quantum-dot-sensitized solar cells with compact PbS quantum-dot thin films and TiO2 nanorod arrays

• Published in: Ceramics international Vol. 43; no. 13; pp. 10052 - 10056
• Main Authors: Zhang, Zhengguo, Shi, Chengwu, Xiao, Guannan, Lv, Kai, Ma, Chengfeng, Yue, Jiangyu
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.09.2017
• Subjects: 1,2-ethanedithiol; All-solid-state quantum-dot-sensitized solar cell; Compact PbS quantum-dot thin film; TiO2 nanorod array; TiO2 nanorod array; Compact PbS quantum-dot thin film; All-solid-state quantum-dot-sensitized solar cell; 1,2-ethanedithiol
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2017.05.022

To improve the electron injection efficiency from PbS quantum dots to TiO2 nanorods and prevent the direct contact of spiro-OMeTAD and TiO2 nanorods, a compact PbS quantum-dot thin film can be successfully obtained on TiO2 nanorod arrays 360nm in length by repeated spin coating of Pb(Ac)2, Na2S and 1,2-ethanedithiol solution in a step-by-step process. The corresponding solid-state quantum-dot-sensitized solar cells are fabricated using a novel structured FTO/compact PbS quantum-dot thin film sensitized TiO2 nanorod array/spiro-OMeTAD/Au that achieves a photoelectric conversion efficiency of 3.57% under AM 1.5G illumination (100mWcm−2), which represents a high value among all-solid-state PbS quantum-dot-sensitized TiO2 nanorod array solar cells.