Air-Stable Surface-Passivated Perovskite Quantum Dots for Ultra-Robust, Single- and Two-Photon-Induced Amplified Spontaneous Emission | Zendy

Jun Pan | Zendy; Smritakshi P. Sarmah | Zendy; Banavoth Murali | Zendy; İbrahim Dursun | Zendy; Wei Peng | Zendy; Manas R. Parida | Zendy; Jiakai Liu | Zendy; Lutfan Sinatra | Zendy; Noktan M. AlYami | Zendy; Chao Zhao | Zendy; Erkki Alarousu | Zendy; Tien Khee Ng | Zendy; Boon S. Ooi | Zendy; Osman M. Bakr | Zendy; Omar F. Mohammed | Zendy

Open Access

Air-Stable Surface-Passivated Perovskite Quantum Dots for Ultra-Robust, Single- and Two-Photon-Induced Amplified Spontaneous Emission

Author(s) -

Jun Pan,

Smritakshi P. Sarmah,

Banavoth Murali,

İbrahim Dursun,

Wei Peng,

Manas R. Parida,

Jiakai Liu,

Lutfan Sinatra,

Noktan M. AlYami,

Chao Zhao,

Erkki Alarousu,

Tien Khee Ng,

Boon S. Ooi,

Osman M. Bakr,

Omar F. Mohammed

Publication year - 2015

Publication title -

the journal of physical chemistry letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.563

H-Index - 203

ISSN - 1948-7185

DOI - 10.1021/acs.jpclett.5b02460

Subject(s) - passivation , quantum dot , perovskite (structure) , photoluminescence , materials science , quantum yield , optoelectronics , laser , amplified spontaneous emission , absorption (acoustics) , nanotechnology , chemical engineering , fluorescence , optics , physics , layer (electronics) , composite material , engineering

We demonstrate ultra-air- and photostable CsPbBr3 quantum dots (QDs) by using an inorganic-organic hybrid ion pair as the capping ligand. This passivation approach to perovskite QDs yields high photoluminescence quantum yield with unprecedented operational stability in ambient conditions (60 ± 5% lab humidity) and high pump fluences, thus overcoming one of the greatest challenges impeding the development of perovskite-based applications. Due to the robustness of passivated perovskite QDs, we were able to induce ultrastable amplified spontaneous emission (ASE) in solution processed QD films not only through one photon but also through two-photon absorption processes. The latter has not been observed before in the family of perovskite materials. More importantly, passivated perovskite QD films showed remarkable photostability under continuous pulsed laser excitation in ambient conditions for at least 34 h (corresponds to 1.2 × 10(8) laser shots), substantially exceeding the stability of other colloidal QD systems in which ASE has been observed.

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