Towards non-blinking and photostable perovskite quantum dots

Mi, Chenjia; Gee, Gavin C.; Lander, Chance W.; Shin, Donghoon; Atteberry, Matthew L.; Akhmedov, Novruz G.; Hidayatova, Lamia; DiCenso, Jesse D.; Yip, Wai Tak; Chen, Bin; Shao, Yihan; Dong, Yitong

doi:10.1038/s41467-024-55619-7

Towards non-blinking and photostable perovskite quantum dots

Journal Article · Thu Jan 02 00:00:00 EST 2025 · Nature Communications

DOI:https://doi.org/10.1038/s41467-024-55619-7· OSTI ID:2484177

^[1]; Gee, Gavin C. ^[2]; ^[2]; ^[3]; Atteberry, Matthew L. ^[2]; Akhmedov, Novruz G. ^[2]; Hidayatova, Lamia ^[2]; DiCenso, Jesse D. ^[2]; Yip, Wai Tak ^[2]; ^[3]; ^[2]; ^[2]

University of Oklahoma, Norman, OK (United States); The University of Oklahoma
University of Oklahoma, Norman, OK (United States)
Northwestern University, Evanston, IL (United States)

Surface defect-induced photoluminescence blinking and photodarkening are ubiquitous in lead halide perovskite quantum dots. Despite efforts to stabilize the surface by chemically engineering ligand binding moieties, blinking accompanied by photodegradation still poses barriers to implementing perovskite quantum dots in quantum emitters. To date, ligand tail engineering in the solid state has rarely been explored for perovskite quantum dots. We posit that attractive intermolecular interactions between low-steric ligand tails, such as π-π stacking, can promote the formation of a nearly epitaxial ligand layer that significantly reduces the quantum dot surface energy. Here, we show that single CsPbBr₃ quantum dots covered by stacked phenethylammonium ligands exhibit nearly non-blinking single photon emission with high purity (~98%) and extraordinary photostability (12 hours continuous operation and saturated excitations), allowing the determination of size-dependent exciton radiative rates and emission line widths of CsPbBr₃ quantum dots at the single particle level.

View Accepted Manuscript (DOE)

Research Organization:: University of Oklahoma, Norman, OK (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0024441

OSTI ID:: 2484177

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 16; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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