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Kai Lv,Chengwu Shi,Zhengguo Zhang,Chengfeng Ma,Qi Wang 한국물리학회 2018 Current Applied Physics Vol.18 No.6
In this work, PbICl precursor solution in N,N-dimethylformamide was successfully applied to deposit PbS quantum-dots on TiO2 nanorod arrays by successive ionic layer adsorption and reaction method (SILAR). The influence of PbI2, PbBr2, PbICl precursor solution on the morphology, crystal size and optical absorption of PbS quantum-dots was investigated and the photovoltaic performance of the corresponding solid-state PbS quantumdot sensitized TiO2 nanorod array solar cells with spiro-OMeTAD was evaluated. The average crystal sizes of PbS quantum-dots were 9.0 nm of PbI2, 8.6 nm of PbBr2 and 8.4 nm of PbICl and the photoelectric conversion efficiency of the corresponding solar cells achieved 2.63%, 3.00%, 3.45%. The result revealed that PbICl precursor solution was superior to PbBr2 and PbI2.