Bright and stable near-infrared lead-free perovskite light-emitting diodesShow others and affiliations
2024 (English)In: Nature Photonics, ISSN 1749-4885, E-ISSN 1749-4893, Vol. 18, p. 170-176Article in journal (Refereed) Published
Abstract [en]
Long-wavelength near-infrared light-emitting diodes (NIR LEDs) with peak emission wavelengths beyond 900 nm are of critical importance for various applications including night vision, biomedical imaging, sensing and optical communications. However, the low radiance and poor operational stability of state-of-the-art long-wavelength NIR LEDs based on soft materials remain the most critical factors limiting their practical applications. Here we develop NIR LEDs emitting beyond 900 nm with improved performance through the rational manipulation of p doping in all-inorganic tin perovskites (CsSnI3) by retarding and controlling the crystallization process of perovskite precursors in tin-rich conditions. The resulting NIR LEDs exhibit a peak emission wavelength at 948 nm, high radiance of 226 W sr-1 m-2 and long operational half-lifetime of 39.5 h at a high constant current density of 100 mA cm-2. Our demonstration of efficient and stable NIR LEDs operating at high current densities may also open up new opportunities towards electrically pumped lasers. Controlling the intrinsic doping of lead-free perovskites enables near-infrared LEDs emitting at 948 nm with a peak radiance of 226 W sr-1 m-2 and a half-lifetime of 39.5 h.
Place, publisher, year, edition, pages
NATURE PORTFOLIO , 2024. Vol. 18, p. 170-176
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:liu:diva-200236DOI: 10.1038/s41566-023-01351-5ISI: 001137092700001OAI: oai:DiVA.org:liu-200236DiVA, id: diva2:1829230
Note
Funding Agencies|National Key Research and Development Program of China; National Natural Science Foundation of China; National Science Fund for Excellent Young Scholars (Overseas) and Special Funds for Introducing Talents from Beijing Normal University; Knut and Alice Wallenberg Foundation; European Research Council; Swedish Research Council Vetenskapsradet; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoeping University (faculty grant SFO-Mat-LiU); Wallenberg Academy [2023YFB3611800]; Swedish Research Council (VR) [22302012]; ERC [312200502508]; Singapore Ministry of Education under its MOE Tier 2 grant [KAW 2019.0082]; National Research Foundation (NRF) Singapore under its NRF Investigatorship [101045098]; European Union's Horizon 2020 research and innovation programme through the ERC project SOPHY [2020-03564]; MSCA-ITN SMART-X [2009-00971]; Marie Sklodowska-Curie grant [KAW-2018.0194]; Swedish Research Council [2019-05551]; [854843]; [MOE-T2EP50120-0004]; [NRF-NRFI2018-04]; [771528]; [860553]; [956270]; [2022-06725]; [2018-05973]
2024-01-182024-01-182024-08-27Bibliographically approved