Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Republic of Korea.
ACS Nano. 2013 Jun 25;7(6):4756-63. doi: 10.1021/nn401274e. Epub 2013 May 14.
We report the first synthesis of colloidal CuInTe2, CuInTe2-xSex gradient alloyed quantum dots (QDs) through a simple hot injection method. We confirmed the composition of synthesized QDs to cationic rich phase of CuIn1.5Te2.5 and Cu0.23In0.36Te0.19Se0.22 with XPS and ICP analysis, and we have also found that the gradient alloyed Cu0.23In0.36Te0.19Se0.22 QDs exhibit greatly improved stability over the CuIn1.5Te2.5 QDs. The solution-processed solar cell based on the gradient alloyed Cu0.23In0.36Te0.19Se0.22 QDs exhibited 17.4 mA/cm(2) of short circuit current density (Jsc), 0.40 V of open circuit voltage (Voc), 44.1% of fill factor (FF), and 3.1% of overall power conversion efficiency at 100 mW/cm(2) AM 1.5G illumination.
我们通过简单的热注射法首次合成了胶体 CuInTe2、CuInTe2-xSex 梯度合金量子点 (QDs)。我们通过 XPS 和 ICP 分析证实了合成 QDs 的组分为阳离子富相的 CuIn1.5Te2.5 和 Cu0.23In0.36Te0.19Se0.22，并且我们还发现梯度合金 Cu0.23In0.36Te0.19Se0.22 QDs 的稳定性比 CuIn1.5Te2.5 QDs 有了显著提高。基于梯度合金 Cu0.23In0.36Te0.19Se0.22 QDs 的溶液处理太阳能电池在 100 mW/cm2 AM1.5G 光照下表现出 17.4 mA/cm2 的短路电流密度 (Jsc)、0.40 V 的开路电压 (Voc)、44.1% 的填充因子 (FF) 和 3.1% 的整体功率转换效率。
