DataVXACS Applied Materials & InterfacesPaper
journal article·2024-06-26

Sn-Doped Zinc Oxide as an Electron Transporting Layer for Enhanced Performance in PbS Quantum Dot Solar Cells

Minji Park, Chanwoo Lim, Hyejin Lee, Byungsoo Kang, Hyun Wook Hwang, Seok Ki Kim, Phillip Lee, Woong Kim, Hyeonggeun Yu, Taehee Kim

ACS Applied Materials & Interfaces· Volume 16· Issue 25
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Source abstract

Abstract

Colloidal PbS quantum dot solar cells (QDSCs) have been primarily demonstrated in n-i-p structures by incorporating a solution-processed ZnO electron transporting layer (ETL). Nevertheless, the inherent energy barrier for the electron extraction at the ZnO/PbS junction along with the defective nature significantly diminishes the performance of the PbS QDSCs. In this study, by employing Sn-doped ZnO (ZTO) ETL, we have tuned the conduction band offset at the junction from spike-type to cliff-type so that the electron extraction barrier can be eliminated and the overall photovoltaic parameters can be enhanced (open-circuit voltage of 0.7 V, fill factor over 70%, and efficiency of 11.3%) as compared with the counterpart with the undoped ZnO ETL. The X-ray photoelectron spectroscopy (XPS) analysis revealed a mitigation of oxygen vacancies in the ZTO ETL of our PbS QDSCs. Our work signifies the importance of Sn doping into the conventional ZnO ETL for the superior electron extraction in PbS QDSCs.
Source: openalex_inverted_index · Quality: baseline

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

Advanced Photovoltaics Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea

Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea

Department of Energy Systems Research, Ajou University, 206 Worldcup-ro, Suwon 16499, Republic of Korea

Division of Nanoscience and Technology, University of Science and Technology (UST), KIST School, Seoul 02792, Republic of Korea

Funding

Korea Institute of Planning and Evaluation for Technology in Food, Agriculture and Forestry · National Research Foundation of Korea · Korea Institute of Science and Technology · K-DARPA program of KIST · Smart Farm Innovation Technology Development Program · Korea Smart Farm R&D Foundation · Grand challenge program of KIST

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