基于锑掺杂二氧化钛电子受体材料的具有高开路电压的碲化镉纳米晶异质结太阳能电池

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

作者信息

Li Miaozi, Liu Xinyan, Wen Shiya, Liu Songwei, Heng Jingxuan, Qin Donghuan, Hou Lintao, Wu Hongbin, Xu Wei, Huang Wenbo

机构信息

School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.

Institute of Polymer Optoelectronic Materials & Devices, State Key Laboratory of Luminescent Materials & Devices, South China University of Technology, Guangzhou 510640, China.

出版信息

Nanomaterials (Basel). 2017 May 3;7(5):101. doi: 10.3390/nano7050101.

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 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 , , 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 .

我们提出将掺锑二氧化钛作为耗尽型碲化镉纳米晶体（NC）异质结太阳能电池的电子受体材料。基于碲化镉纳米晶体和二氧化钛前驱体，通过合理的常温溶液工艺制备了具有FTO/ZnO/掺锑二氧化钛/碲化镉/金结构的新型器件。通过引入具有掺杂浓度的二氧化钛，我们能够调整纳米晶体太阳能电池的光电性能。我们的新型器件展现出0.74 V的非常高的开路电压，这是所有基于碲化镉纳米晶体的太阳能电池中报道的最高值。太阳能电池的功率转换效率（PCE）随着掺锑含量从1%增加到3%而提高，然后由于复合效应，随着锑含量的进一步增加几乎呈线性下降。最佳器件的Jsc、Voc、FF和PCE分别为14.65 mA/cm²、0.70 V、34.44和3.53%，这对于具有高Jsc的溶液处理纳米晶体太阳能电池来说很有前景。