Perovskite Quantum Dot Photovoltaic Materials beyond the Reach of Thin Films: Full-Range Tuning of A-Site Cation Composition

Hazarika, Abhijit; Zhao, Qian; Gaulding, E. Ashley; Christians, Jeffrey A.; Dou, Benjia; Marshall, Ashley R.; Moot, Taylor; Berry, Joseph J.; Johnson, Justin C.; Luther, Joseph M.

doi:10.1021/acsnano.8b05555

Perovskite Quantum Dot Photovoltaic Materials beyond the Reach of Thin Films: Full-Range Tuning of A-Site Cation Composition

Journal Article · Tue Sep 25 00:00:00 EDT 2018 · ACS Nano

DOI:https://doi.org/10.1021/acsnano.8b05555· OSTI ID:1476707

^[1]; Zhao, Qian ^[2]; Gaulding, E. Ashley ^[1]; ^[1]; Dou, Benjia ^[3]; Marshall, Ashley R. ^[1]; Moot, Taylor ^[1]; ^[1]; ^[1]; ^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States); Nankai Univ., Tianjin (China)
National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)

We present a cation-exchange approach for tunable A-site alloys of cesium (Cs⁺) and formamidinium (FA⁺) lead triiodide perovskite nanocrystals that enables the formation of compositions spanning the complete range of Cs_1-xFA_xPbI₃, unlike thin-film alloys or the direct synthesis of alloyed perovskite nanocrystals. These materials show bright and finely tunable emission in the red and near-infrared range between 650 and 800 nm. The activation energy for the miscibility between Cs⁺ and FA⁺ is measured (~0.65 eV) and is shown to be higher than reported for X-site exchange in lead halide perovskites. We use these alloyed colloidal perovskite quantum dots to fabricate photovoltaic devices. In addition to the expanded compositional range for Cs_1-xFA_xPbI₃ materials, the quantum dot solar cells exhibit high open-circuit voltage (VOC) with a lower loss than the thin-film perovskite devices of similar compositions.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Advanced Solar Photophysics (CASP); National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1476707

Report Number(s):: NREL/JA--5900-71956

Journal Information:: ACS Nano, Journal Name: ACS Nano Journal Issue: 10 Vol. 12; ISSN 1936-0851

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Quantum Dots for Hybrid Energy Harvesting: From Integration to Piezo‐Phototronics Cho, Yuljae; Pak, Sangyeon; An, Geon‐Hyoung Israel Journal of Chemistry, Vol. 59, Issue 8 https://doi.org/10.1002/ijch.201900035	journal	May 2019
Halide Perovskite Nanocrystals for Next‐Generation Optoelectronics Liu, Maning; Zhang, Haichang; Gedamu, Dawit Small, Vol. 15, Issue 28 https://doi.org/10.1002/smll.201900801	journal	April 2019
Getting high with quantum dot solar cells Jean, Joel Nature Energy, Vol. 5, Issue 1 https://doi.org/10.1038/s41560-019-0534-8	journal	January 2020
Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs1−xFAxPbI3 quantum dot solar cells with reduced phase segregation Hao, Mengmeng; Bai, Yang; Zeiske, Stefan Nature Energy, Vol. 5, Issue 1 https://doi.org/10.1038/s41560-019-0535-7	journal	January 2020
Enhanced photoredox activity of CsPbBr ₃ nanocrystals by quantitative colloidal ligand exchange Lu, Haipeng; Zhu, Xiaolin; Miller, Collin The Journal of Chemical Physics, Vol. 151, Issue 20 https://doi.org/10.1063/1.5129261	journal	November 2019
Perovskite nanocrystals for energy conversion and storage Kostopoulou, Athanasia; Brintakis, Konstantinos; Nasikas, Nektarios K. Nanophotonics, Vol. 8, Issue 10 https://doi.org/10.1515/nanoph-2019-0119	journal	July 2019

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