Highly stable cesium lead iodide perovskite quantum dot light-emitting diodes
Abstract
Recently, all-inorganic perovskites such as CsPbBr3 and CsPbI3, have emerged as promising materials for light-emitting applications. While encouraging performance has been demonstrated, the stability issue of the red-emitting CsPbI3 is still a major concern due to its small tolerance factor. Here we report a highly stable CsPbI3 quantum dot LED with red emission fabricated using an improved purification approach. The device achieved decent external quantum efficiency (EQE) of 0.21 % at a bias of 6 V and outstanding operational stability, with a L70 lifetime (EL intensity decreases to 70% of starting value) of 16 h and 1.5 h under a constant driving voltage of 5 V and 6 V (maximum EQE operation) respectively. Furthermore, the device can work under a higher voltage of 7 V (maximum luminance operation) and retain 50% of its initial EL intensity after 500 s. These findings demonstrate the promise of CsPbI3 quantum dots for stable red LEDs, and suggest the feasibility for electrically pumped perovskite lasers with further device optimizations.
- Authors:
-
[1];
- Univ. of Washington, Seattle, WA (United States). Electrical Engineering
- National Taiwan Univ., Taipei (Taiwan). Inst. of Electronics Engineering
- National Renewable Energy Lab. (NREL), Golden, CO (United States). Chemical and Biosciences Center
- Publication Date:
- Research Org.:
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Advanced Solar Photophysics (CASP)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Aeronautics and Space Administration (NASA); Ministry of Science and Technology of Taiwan
- OSTI Identifier:
- 1395314
- Report Number(s):
- NREL/JA-5900-68649
Journal ID: ISSN 0957-4484
- Grant/Contract Number:
- AC36-08GO28308; NNX13AL60H; MOST 105-2811-M-029-003
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nanotechnology
- Additional Journal Information:
- Journal Volume: 28; Journal Issue: 45; Journal ID: ISSN 0957-4484
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 36 MATERIALS SCIENCE; quantum dots; perovskites; LEDs
Citation Formats
Zou, Chen, Huang, Chun-Ying, Sanehira, Erin M., Luther, Joseph, and Lin, Lih Y. Highly stable cesium lead iodide perovskite quantum dot light-emitting diodes. United States: N. p., 2017.
Web. doi:10.1088/1361-6528/aa8b8b.
Zou, Chen, Huang, Chun-Ying, Sanehira, Erin M., Luther, Joseph, & Lin, Lih Y. Highly stable cesium lead iodide perovskite quantum dot light-emitting diodes. United States. https://doi.org/10.1088/1361-6528/aa8b8b
Zou, Chen, Huang, Chun-Ying, Sanehira, Erin M., Luther, Joseph, and Lin, Lih Y. Mon .
"Highly stable cesium lead iodide perovskite quantum dot light-emitting diodes". United States. https://doi.org/10.1088/1361-6528/aa8b8b. https://www.osti.gov/servlets/purl/1395314.
@article{osti_1395314,
title = {Highly stable cesium lead iodide perovskite quantum dot light-emitting diodes},
author = {Zou, Chen and Huang, Chun-Ying and Sanehira, Erin M. and Luther, Joseph and Lin, Lih Y.},
abstractNote = {Recently, all-inorganic perovskites such as CsPbBr3 and CsPbI3, have emerged as promising materials for light-emitting applications. While encouraging performance has been demonstrated, the stability issue of the red-emitting CsPbI3 is still a major concern due to its small tolerance factor. Here we report a highly stable CsPbI3 quantum dot LED with red emission fabricated using an improved purification approach. The device achieved decent external quantum efficiency (EQE) of 0.21 % at a bias of 6 V and outstanding operational stability, with a L70 lifetime (EL intensity decreases to 70% of starting value) of 16 h and 1.5 h under a constant driving voltage of 5 V and 6 V (maximum EQE operation) respectively. Furthermore, the device can work under a higher voltage of 7 V (maximum luminance operation) and retain 50% of its initial EL intensity after 500 s. These findings demonstrate the promise of CsPbI3 quantum dots for stable red LEDs, and suggest the feasibility for electrically pumped perovskite lasers with further device optimizations.},
doi = {10.1088/1361-6528/aa8b8b},
journal = {Nanotechnology},
number = 45,
volume = 28,
place = {United States},
year = {Mon Sep 11 00:00:00 EDT 2017},
month = {Mon Sep 11 00:00:00 EDT 2017}
}
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