One-step solution synthesis of white-light emitting films via dimensionality control of the Cs–Cu–I system
| Autor: | Soshi Iimura, Kihyung Sim, Yoshihiko Kanemitsu, Masato Sasase, Junghwan Kim, Hideo Hosono, Taketo Handa, Taehwan Jun |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Photoluminescence
Materials science lcsh:Biotechnology chemistry.chemical_element Halide Quantum yield Phosphor 02 engineering and technology 01 natural sciences lcsh:TP248.13-248.65 0103 physical sciences General Materials Science Thin film Common emitter 010302 applied physics business.industry General Engineering 021001 nanoscience & nanotechnology Copper lcsh:QC1-999 chemistry Optoelectronics 0210 nano-technology Luminescence business lcsh:Physics |
| Zdroj: | APL Materials, Vol 7, Iss 11, Pp 111113-111113-6 (2019) |
| Popis: | Low-dimensional lead-free luminescent halides have emerged as highly promising phosphors for white-light emission. Recently, we reported a broadband blue-emitting copper(I) iodide-based material, Cs3Cu2I5, with a high photoluminescence quantum yield (PLQY) (∼90%) and a zero-dimensional nature, providing significant dimensionality for the photoactive site. However, this material is insufficient as a white-light emitter owing to the deficient yellow emission. In this paper, we report a novel yellow luminescent phosphor, CsCu2I3, with a 1D structure for the photoactive site. This material exhibits a broadband emission centered at ∼560 nm with a PLQY of ∼8%. We demonstrate a thin film with white-light emission that can be fabricated using one-step spin-coating of a mixed precursor solution of 1D CsCu2I3 (yellow) and 0D Cs3Cu2I5 (blue). |
| Databáze: | OpenAIRE |
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