Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 10, Issue 23, Pages 7439-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.9b03035
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Funding
- National Natural Science Foundation of China [51972118, 51722202]
- Natural Science Foundations of Beijing [2172036]
- Fundamental Research Funds for the Central Universities [FRF-TP-18-002C1]
- Guangdong Provincial Science AMP
- Technology Project [2018A050506004]
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Doped halide perovskite nanocrystals (NCs) have opened new opportunities for the emerging optical and optoelectronic applications. Here, we describe a hot-injection synthesis of all-inorganic lead-free Cs2SnCl6 and Sb3+ doped Cs2SnCl6 NCs. Cs2SnCl6 NCs present a blue emission peak at 438 nm, whereas a new broad-band emission peak appears at 615 nm for the Sb3+ doped NCs. Comparative structural and spectral characterizations of Sb3+ doped Cs2SnCl6 NCs with micrometer-sized undoped and Sb3+ doped crystals show that the formation of broad-band orange emission is originted from triplet self-trapped excitons, attributed to the P-3(n)-S-1(0) transitions (n = 0, 1, 2). Our results in Sb3+ doped Cs2SnCl6 materials provide insights into the machanisms of doping-induced emission centers, and it extends the existing knowledge of optical properties of doped halide NCs for further studies.
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