题目：

Merging Passivation in Synthesis Enabling the Lowest Open-Circuit Voltage Loss for PbS Quantum Dot Solar Cells

作者：

Yang Liu^1#, Hao Wu^1#, Guozheng Shi¹, Yusheng Li³, Yiyuan Gao¹,Shiwen Fang¹, Haodong Tang⁴, Wei Chen⁴, Tianshu Ma⁶, Irfan Khan¹, Kai Wang⁵, Changlei Wang⁶, Xiaofeng Li⁶, Qing Shen³, Zeke Liu^1,2* and Wanli Ma^1,2*

单位：

¹Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, Jiangsu, PR China

²Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, Jiangsu, P. R. China

³Faculty of Informatics and Engineering The University of Electro-Communications Tokyo 182-8585, Japan

⁴Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China

⁵College of Engineering Physics Shenzhen Technology University Shenzhen 518118, China

⁶School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology; Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University Suzhou 215006, China

摘要：

The high open-circuit voltage (Voc) loss arising from insufficient surface passivation is the main facto  that limits the efficiency of current PbS colloidal quantum dots (CQDs) solar cell. Here, we perform synergistic passivation in the direct synthesis of conductive PbS CQD inks by introducing multifunctional ligands to well coordinate the complicated CQDs surface with the thermodynamically optimal configuration. The improved passivation effect is intactly delivered to the final photovoltaic device, leading to an order lower surface trap density and beneficial doping behavior compared to the control sample. The obtained CQD inks show the highest PLQY of 24% for all photovoltaic PbS CQD inks, which is more than twice the reported average PLQY value of ～10%. As a result, a high Voc of 0.71 V and PCE of 13.3% is achieved, which results in the lowest Voc loss (0.35 eV) for the reported PbS CQD solar cells with PCE >10%, comparable to that of perovskite solar cells. Our work provides valuable insights into the future CQDs passivation strategies and also demonstrates the great potential for the direct-synthesis protocol of PbS CQDs.

影响因子：

30.849

分区情况：

一区

链接：

https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.202207293