Lead‐Free Highly Efficient Blue‐Emitting Cs3Cu2I5 with 0D Electronic Structure
Top Cited Papers
- 14 September 2018
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 30 (43)
Abstract
Halide perovskites, including CsPbX3 (X = Cl, Br, I), have gained much attention in the field of optoelectronics. However, the toxicity of Pb and the low photoluminescence quantum yield (PLQY) of these perovskites hamper their use. In this work, new halide materials that meet the requirements of: (i) nontoxicity, (ii) high PLQY, and (iii) ease of fabrication of thin films via the solution process are explored. In particular, copper(I) halide compounds with low‐dimensional electronic structures are considered. Cs3Cu2I5 has a 0D photoactive site and exhibits blue emission (≈445 nm) with very high PLQYs of ≈90 and ≈60% for single crystals and thin films, respectively. The large exciton binding energy of ≈490 meV explains well the 0D electronic nature of Cs3Cu2I5. Blue electroluminescence of Pb‐free halides is demonstrated using solution‐derived Cs3Cu2I5 thin films.Keywords
This publication has 32 references indexed in Scilit:
- Lead‐Free, Air‐Stable All‐Inorganic Cesium Bismuth Halide Perovskite NanocrystalsAngewandte Chemie International Edition, 2017
- Low‐Dimensional Organic Tin Bromide Perovskites and Their Photoinduced Structural TransformationAngewandte Chemie International Edition, 2017
- Efficient charge generation layer for tandem OLEDs: Bi-layered MoO3/ZnO-based oxide semiconductorOrganic Electronics, 2017
- Copper and Gold Cyclic (Alkyl)(amino)carbene Complexes with Sub‐Microsecond Photoemissions: Structure and Substituent Effects on Redox and Luminescent PropertiesChemistry – A European Journal, 2017
- Lead‐Free, Blue Emitting Bismuth Halide Perovskite Quantum DotsAngewandte Chemie International Edition, 2016
- Low-Temperature Solution-Grown CsPbBr3 Single Crystals and Their CharacterizationCrystal Growth & Design, 2016
- Perovskite Materials for Light‐Emitting Diodes and LasersAdvanced Materials, 2016
- CsPbX3 Quantum Dots for Lighting and Displays: Room‐Temperature Synthesis, Photoluminescence Superiorities, Underlying Origins and White Light‐Emitting DiodesAdvanced Functional Materials, 2016
- Single‐Layer Light‐Emitting Diodes Using Organometal Halide Perovskite/Poly(ethylene oxide) Composite Thin FilmsAdvanced Materials, 2015
- Crystal structures and ionic conductivities of ternary derivatives of the silver and copper monohalides—II: ordered phases within the (AgX)x–(MX)1−x and (CuX)x–(MX)1−x (M=K, Rb and Cs; X=Cl, Br and I) systemsJournal of Solid State Chemistry, 2004