Chen Chong, Ling Lanyu, Li Fumin
Henan Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng, 475004, People's Republic of China.
School of Physics and Electronics, Henan University, Kaifeng, 475004, People's Republic of China.
Nanoscale Res Lett. 2017 Dec;12(1):4. doi: 10.1186/s11671-016-1787-9. Epub 2017 Jan 4.
In this paper, to improve the power conversion efficiencies (PCEs) of quantum dot-sensitized solar cells (QDSSCs) based on CdS-sensitized TiO nanotube (TNT) electrodes, two methods are employed on the basis of our previous work. First, by replacing the traditional single-sided working electrodes, double-sided transparent TNT/ITO (DTTO) electrodes are prepared to increase the loading amount of quantum dots (QDs) on the working electrodes. Second, to increase the light absorption of the CdS-sensitized DTTO electrodes and improve the efficiency of charge separation in CdS-sensitized QDSSCs, copper indium disulfide (CuInS) is selected to cosensitize the DTTO electrodes with CdS, which has a complementary property of light absorption with CdS. The PCEs of QDSSCs based on these prepared QD-sensitized DTTO electrodes are measured. Our experimental results show that compared to those based on the CdS/DTTO electrodes without CuInS, the PCEs of the QDSSCs based on CdS/CuInS-sensitized DTTO electrode are significantly improved, which is mainly attributed to the increased light absorption and reduced charge recombination. Under simulated one-sun illumination, the best PCE of 1.42% is achieved for the QDSSCs based on CdS(10)/CuInS/DTTO electrode, which is much higher than that (0.56%) of the QDSSCs based on CdS(10)/DTTO electrode.
在本文中，为提高基于硫化镉敏化二氧化钛纳米管（TNT）电极的量子点敏化太阳能电池（QDSSC）的功率转换效率（PCE），在我们之前工作的基础上采用了两种方法。首先，通过替换传统的单面工作电极，制备双面透明TNT/ITO（DTTO）电极以增加工作电极上量子点（QD）的负载量。其次，为增加硫化镉敏化DTTO电极的光吸收并提高硫化镉敏化QDSSC中的电荷分离效率，选择二硫化铜铟（CuInS）与硫化镉共同敏化DTTO电极，其与硫化镉具有互补的光吸收特性。测量了基于这些制备的量子点敏化DTTO电极的QDSSC的PCE。我们的实验结果表明，与基于不含CuInS的硫化镉/DTTO电极的QDSSC相比，基于硫化镉/CuInS敏化DTTO电极的QDSSC的PCE显著提高，这主要归因于光吸收的增加和电荷复合的减少。在模拟的一个太阳光照下，基于硫化镉(10)/CuInS/DTTO电极的QDSSC实现了1.42%的最佳PCE，远高于基于硫化镉(10)/DTTO电极的QDSSC的PCE（0.56%）。
