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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Impact of Host Composition, Codoping, or Tridoping on Quantum-Cutting Emission of Ytterbium in Halide Perovskite Quantum Dots and Solar Cell Applications.
TL;DR: Overall emissions with 173% photoluminescence quantum yield (PLQY) were obtained in the Yb3-Pr3+-Ce3+ tri-doped PQDs, which was designed as the down-converter for the CuIn1-xGaxSe2(CIGS) as well as the silicon solar cells, which relatively leads to enhancement of power conversion efficiency (PCE) as high as ~20%.
Journal ArticleDOI
Organic−Inorganic Layered and Hollow Tin Bromide Perovskite with Tunable Broadband Emission
Pengfei Fu,Pengfei Fu,Menglin Huang,Yuequn Shang,Yuequn Shang,Na Yu,Hao-Long Zhou,Yue-Biao Zhang,Shiyou Chen,Jinkang Gong,Zhijun Ning +10 more
TL;DR: This toxic-free low-dimensional tin perovskite exhibits a broadband emission in the visible region with a high luminescence quantum yield of 86%.
Journal ArticleDOI
Exciton Relaxation Dynamics in Photo-Excited CsPbI3 Perovskite Nanocrystals.
Qinghui Liu,Yinghui Wang,Ning Sui,Yanting Wang,Xiaochun Chi,Qianqian Wang,Ying Chen,Wenyu Ji,Lu Zou,Hanzhuang Zhang +9 more
TL;DR: The exciton relaxation process of CsPbI3 perovskite nanocrystals (NCs) has been investigated by using transient absorption (TA) spectroscopy and it is confirmed that the weight of hot exciton also increase together with that of Auger recombination at high excitation intensity when CspbI 3 NCs in high energy excitonic states.
Journal ArticleDOI
Octahedral tilting instabilities in inorganic halide perovskites
TL;DR: In this paper, the structural instabilities present in inorganic cubic and tetragonal halide perovskites with Pb or Sn on the metal site and Br or I on the $X$ site were investigated.
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