Temperature Dependence of the Amplified Spontaneous Emission from CsPbBr3 Nanocrystal Thin Films

被引：76

作者：

Balena, Antonio ^{[1
]}

Perulli, Andrea ^{[1
]}

Fernandez, Manuel ^{[1
]}

De Giorgi, Maria Luisa ^{[1
]}

Nedelcu, Georgian ^{[2
,3
]}

Kovalenko, Maksym V. ^{[2
,3
]}

Anni, Marco ^{[1
]}

机构：

[1] Univ Salento, Dipartimento Matemat & Fis Ennio De Giorgi, Via Arnesano, I-73100 Lecce, Italy

[2] ETH, Dept Chem & Appl Biosci, Inst Inorgan Chem, CH-8093 Zurich, Switzerland

[3] Empa Swiss Fed Labs Mat Sci & Technol, Lab Thin Films & Photovolta, CH-8600 Dubendorf, Switzerland

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2018年 / 122卷 / 10期

关键词：

HALIDE PEROVSKITES CSPBX3; ROOM-TEMPERATURE; ENERGY-TRANSFER; ANION-EXCHANGE; QUANTUM DOTS; PHOTOLUMINESCENCE; BR; CL;

D O I：

10.1021/acs.jpcc.8b01419

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cesius lead halide perovskite colloidal nanocrystals are among the most promising perovskite systems for light-emitting devices applications due to their high fluorescence quantum yield and high optical gain'at room temperature. In this letter, we report on the first investigation of temperature dependence of amplified spontaneous emission (ASE) properties of thin films of CsPbBr3 nanocrystals. We demonstrate that ASE is strongly temperature-dependent, with a complex variation in temperature of the ASE intensity, threshold, and peak wavelength. The joint investigation of the photoluminescence (PL) spectra below and above the ASE threshold alows us to conclude that the temperature increase results in the formation of disordered stibdomains emitting in the low-energy tail of the PL spectra, leading to the existence of three emission regimes with transitions at about 90 and 170 K, with individually different temperature dependences.

引用

页码：5813 / 5819

页数：7

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