DOI: 10.1126/science.aaf9570. Screening in crystalline liquids protects energetic carriers in hybrid perovskites

Screening in crystalline liquids protects energetic carriers in hybrid perovskites

10.1126/science.aaf9570

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

Hybrid lead halide perovskites exhibit carrier properties that resemble those of pristine nonpolar semiconductors despite static and dynamic disorder, but how carriers are protected from efficient scattering with charged defects and optical phonons is unknown. Here, we reveal the carrier protection mechanism by comparing three single-crystal lead bromide perovskites: CH 3 NH 3 PbBr 3 , CH(NH 2 ) 2 PbBr 3 , and CsPbBr 3 . We observed hot fluorescence emission from energetic carriers with ~10 2 -picosecond lifetimes in CH 3 NH 3 PbBr 3 or CH(NH 2 ) 2 PbBr 3 , but not in CsPbBr 3 . The hot fluorescence is correlated with liquid-like molecular reorientational motions, suggesting that dynamic screening protects energetic carriers via solvation or large polaron formation on time scales competitive with that of ultrafast cooling. Similar protections likely exist for band-edge carriers. The long-lived energetic carriers may enable hot-carrier solar cells with efficiencies exceeding the Shockley-Queisser limit.

Bibliography

Zhu, H., Miyata, K., Fu, Y., Wang, J., Joshi, P. P., Niesner, D., Williams, K. W., Jin, S., & Zhu, X.-Y. (2016). Screening in crystalline liquids protects energetic carriers in hybrid perovskites. Science, 353(6306), 1409â1413.

Authors 9

Haiming Zhu (first)
Kiyoshi Miyata (additional)
Yongping Fu (additional)
Jue Wang (additional)
Prakriti P. Joshi (additional)
Daniel Niesner (additional)
Kristopher W. Williams (additional)
Song Jin (additional)
X.-Y. Zhu (additional)

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Dates

Type	When
Created	8 years, 11 months ago (Sept. 22, 2016, 2:38 p.m.)
Deposited	1 year, 7 months ago (Jan. 15, 2024, 12:22 p.m.)
Indexed	1 day, 8 hours ago (Aug. 27, 2025, 12:20 p.m.)
Issued	8 years, 11 months ago (Sept. 23, 2016)
Published	8 years, 11 months ago (Sept. 23, 2016)
Published Print	8 years, 11 months ago (Sept. 23, 2016)

Funders 3

U.S. Department of Energy, Office of Science-Basic Energy Sciences
Awards1
1. ER46980
National Science Foundation 10.13039/100000001
Region: Americas
gov (National government)
Labels4
1. U.S. National Science Foundation
2. NSF
3. US NSF
4. USA NSF
Awards1
1. DMR 1420634
Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering
Awards1
1. DE-FG02-09ER46664

BibTeX

@article{Zhu_2016, title={Screening in crystalline liquids protects energetic carriers in hybrid perovskites}, volume={353}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.aaf9570}, DOI={10.1126/science.aaf9570}, number={6306}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Zhu, Haiming and Miyata, Kiyoshi and Fu, Yongping and Wang, Jue and Joshi, Prakriti P. and Niesner, Daniel and Williams, Kristopher W. and Jin, Song and Zhu, X.-Y.}, year={2016}, month=sep, pages={1409–1413} }

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