DataVXAdvanced MaterialsPaper
journal article·2023-02

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

Yang Liu, Hao Wu, Guozheng Shi, Yusheng Li, Yiyuan Gao, Shiwen Fang, Haodong Tang, Wei Chen, Tianshu Ma, Irfan Khan, Kai Wang, Changlei Wang, Xiaofeng Li, Qing Shen, Zeke Liu, Wanli Ma

Advanced Materials· Volume 35· Issue 5
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Source abstract

Abstract

Abstract The high open‐circuit voltage (Voc) loss arising from insufficient surface passivation is the main factor that limits the efficiency of current lead sulfide colloidal quantum dots (PbS CQDs) solar cell. Here, synergistic passivation is performed 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 photoluminescence quantum yield (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 power conversion efficiency (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. This work provides valuable insights into the future CQDs passivation strategies and also demonstrates the great potential for the direct‐synthesis protocol of PbS CQDs.
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Research context

Electronic materials

OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Functional Nano & Soft Materials (FUNSOM) Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University Suzhou Jiangsu 215123 P. R. China

Faculty of Informatics and Engineering The University of Electro‐Communications Tokyo 182‐8585 Japan

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

College of Engineering Physics Shenzhen Technology University Shenzhen 518118 China

School 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

Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow University 199 Ren'ai Road Suzhou Jiangsu 215123 P. R. China

Funding

National Natural Science Foundation of China · China Postdoctoral Science Foundation · Higher Education Discipline Innovation Project

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