Carrier Management via Integrating InP Quantum Dots into Electron Transport 
Layer for Efficient Perovskite Solar Cells

Wu, J.; Li, M.-H.; Jiang, Y.; Xu, Q.; Xian, L. D.; Guo, H.; Wan, J.; Wen, R.; Fang, Y.; Xie, D.; Lei, Y.; Hu, J.-S.; Lin, Y.

doi:10.1021/acsnano.2c06171

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Carrier Management via Integrating InP Quantum Dots into Electron Transport Layer for Efficient Perovskite Solar Cells

MPS-Authors

/persons/resource/persons221904

Xian, L. D.
Songshan Lake Materials Laboratory;
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science;

External Resource

https://doi.org/10.1021/acsnano.2c06171
(Publisher version)

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

nn2c06171_si_001.pdf
(Supplementary material), 2MB

Citation

Wu, J., Li, M.-H., Jiang, Y., Xu, Q., Xian, L. D., Guo, H., et al. (2022). Carrier Management via Integrating InP Quantum Dots into Electron Transport Layer for Efficient Perovskite Solar Cells. ACS Nano, 16(9), 15063-15071. doi:10.1021/acsnano.2c06171.

Cite as: https://hdl.handle.net/21.11116/0000-000B-283D-5

Abstract

Metal oxides are the most efficient electron transport layers (ETLs) in perovskite solar cells (PSCs). However, issues related to the bulk (i.e., insufficient electron mobility, unfavorable energy level position) and interface of metal oxide/perovskite (detrimental surface hydroxyl groups) limit the transport kinetics of photoinduced electrons and prevent PSCs from unleashing their theoretical efficiency potential. Herein, the inorganic InP colloid quantum dots (CQDs) with outstanding electron mobility (4600 cm² V^-1 s^-1) and carboxyl (−COOH) terminal ligands were uniformly distributed into the metal oxide ETL to form consecutive electron transport channels. The hybrid InP CQD-based ETL demonstrates a more N-type characteristic with more than 3-fold improvement in electron mobility. The formation of the Sn–O–In bond facilitates electron extraction due to suitable energy level alignment between the ETL and perovskite. The strong interaction between uncoordinated Pb²⁺ at the perovskite/ETL interface and the −COO^- in the ligand of InP CQDs reduces the density of defects in perovskite. As a result, the hybrid InP CQD-based ETL with an optimized InP ratio (18 wt %) boosts the power conversion efficiency of PSCs from 22.38 to 24.09% (certified efficiency of 23.43%). Meanwhile, the device demonstrates significantly improved photostability and atmospheric storage stability.