Nanocrystals of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, and I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color Gamut
Loredana Protesescu,Loredana Protesescu,Sergii Yakunin,Sergii Yakunin,Maryna I. Bodnarchuk,Maryna I. Bodnarchuk,Franziska Krieg,Franziska Krieg,Riccarda Caputo,Christopher H. Hendon,Ruo Xi Yang,Aron Walsh,Maksym V. Kovalenko,Maksym V. Kovalenko +13 more
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TLDR
The compelling combination of enhanced optical properties and chemical robustness makes CsPbX3 nanocrystals appealing for optoelectronic applications, particularly for blue and green spectral regions (410–530 nm), where typical metal chalcogenide-based quantum dots suffer from photodegradation.Abstract:
Metal halides perovskites, such as hybrid organic–inorganic CH3NH3PbI3, are newcomer optoelectronic materials that have attracted enormous attention as solution-deposited absorbing layers in solar cells with power conversion efficiencies reaching 20%. Herein we demonstrate a new avenue for halide perovskites by designing highly luminescent perovskite-based colloidal quantum dot materials. We have synthesized monodisperse colloidal nanocubes (4–15 nm edge lengths) of fully inorganic cesium lead halide perovskites (CsPbX3, X = Cl, Br, and I or mixed halide systems Cl/Br and Br/I) using inexpensive commercial precursors. Through compositional modulations and quantum size-effects, the bandgap energies and emission spectra are readily tunable over the entire visible spectral region of 410–700 nm. The photoluminescence of CsPbX3 nanocrystals is characterized by narrow emission line-widths of 12–42 nm, wide color gamut covering up to 140% of the NTSC color standard, high quantum yields of up to 90%, and radiativ...read more
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Lead-Free Silver-Bismuth Halide Double Perovskite Nanocrystals.
Bin Yang,Bin Yang,Junsheng Chen,Junsheng Chen,Songqiu Yang,Feng Hong,Feng Hong,Lei Sun,Peigeng Han,Peigeng Han,Tõnu Pullerits,Weiqiao Deng,Weiqiao Deng,Ke-Li Han,Ke-Li Han +14 more
TL;DR: The results suggest that the double perovskite NCs could be potential materials for optoelectronic applications by better controlling the surface defects.
Journal ArticleDOI
Fluorescent Alloy CsPbxMn1–xI3 Perovskite Nanocrystals with High Structural and Optical Stability
Quinten A. Akkerman,Quinten A. Akkerman,Daniele Meggiolaro,Zhiya Dang,Filippo De Angelis,Liberato Manna +5 more
TL;DR: All alloyed CsPbxMn1–xI3 nanocrystals have essentially the same optical features and crystal structure as the parent α-CsPbI3 system, but they are stable in films and in solution for periods over a month.
Journal ArticleDOI
Efficient Blue and White Perovskite Light-Emitting Diodes via Manganese Doping
TL;DR: In this article, a two-step synthetic approach was employed to tune the manganese doping to increase the blue photoluminescence while preventing significant manganous emission, allowing for blue perovskite LEDs with quantum efficiencies over 2% that meet the NTSC standard.
Journal ArticleDOI
Solution-Grown CsPbBr3 Perovskite Single Crystals for Photon Detection
Dmitry N. Dirin,Ihor Cherniukh,Ihor Cherniukh,Sergii Yakunin,Sergii Yakunin,Yevhen Shynkarenko,Yevhen Shynkarenko,Yevhen Shynkarenko,Maksym V. Kovalenko,Maksym V. Kovalenko +9 more
Journal ArticleDOI
High efficiency perovskite quantum dot solar cells with charge separating heterostructure.
Qian Zhao,Abhijit Hazarika,Xihan Chen,Steve Harvey,Bryon W. Larson,Glenn Teeter,Jun Liu,Tao Song,Chuanxiao Xiao,Liam Shaw,Minghui Zhang,Guo-Ran Li,Matthew C. Beard,Joseph M. Luther +13 more
TL;DR: Zhao et al. fabricate heterojunctions of colloidal perovskite quantum dots with different composition using layer-by-layer deposition and demonstrate improved photovoltaic performance with enhanced photocarrier harvesting.
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