CdTe Nanocrystal Hetero-Junction Solar Cells with High Open Circuit Voltage Based on Sb-doped TiO2 Electron Acceptor Materials

Nanomaterials

Hongbin Wu¹  Lintao Hou²  Wenbo Huang³  Donghuan Qin³  Jingxuan Heng⁴  Shiya Wen⁴  Xinyan Liu⁴  Songwei Liu⁴  Miaozi Li⁴  Wei Xu⁵ 

[1] Devices, South China University of Technology, Guangzhou 510640, China;;Devices, State Key Laboratory of Luminescent Materials &;Institute of Polymer Optoelectronic Materials &School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou 510632, China;

关键词: nanocrystal;    solar cells;    CdTe;    heterojunction;   

DOI  :  10.3390/nano7050101

来源: DOAJ

【 摘 要 】

We propose Sb-doped TiO2 as electron acceptor material for depleted CdTe nanocrystal (NC) hetero-junction solar cells. Novel devices with the architecture of FTO/ZnO/Sb:TiO2/CdTe/Au based on CdTe NC and TiO2 precursor are fabricated by rational ambient solution process. By introducing TiO2 with dopant concentration, we are able to tailor the optoelectronic properties of NC solar cells. Our novel devices demonstrate a very high open circuit voltage of 0.74 V, which is the highest Voc reported for any CdTe NC based solar cells. The power conversion efficiency (PCE) of solar cells increases with the increase of Sb-doped content from 1% to 3%, then decreases almost linearly with further increase of Sb content due to the recombination effect. The champion device shows Jsc, Voc, FF, and PCE of 14.65 mA/cm2, 0.70 V, 34.44, and 3.53% respectively, which is prospective for solution processed NC solar cells with high Voc.

【 授权许可】

Unknown