Nanocrystals of Cesium Lead Halide Perovskites (CsPbX₃, X = Cl, Br, and I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color Gamut.
Nanocrystals of Cesium Lead Halide Perovskites (CsPbX₃, X = Cl, Br, and I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color Gamut.
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DOI：
10.1021/nl5048779
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发表时间：
2015-06-10
期刊：
影响因子：
10.8
通讯作者：
Kovalenko MV
中科院分区：
文献类型：
--
作者：
Protesescu L;Yakunin S;Bodnarchuk MI;Krieg F;Caputo R;Hendon CH;Yang RX;Walsh A;Kovalenko MV
金属卤化物钙钛矿，如混合有机-无机CH 3 NH3 PbI 3，是新的光电材料，作为太阳能电池中的溶液沉积吸收层，其功率转换效率达到20%，引起了极大的关注。在这里，我们展示了一个新的途径，卤化物钙钛矿通过设计高发光钙钛矿基胶体量子点材料。我们已经使用廉价的商业前体合成了全无机铯铅卤化物钙钛矿（CsPbX 3，X = Cl、Br和I或混合卤化物体系Cl/Br和Br/I）的单分散胶体纳米立方体（4-15 nm边长）。通过组分调制和量子尺寸效应，带隙能量和发射光谱在410-700 nm的整个可见光谱区域内容易地可调。CsPbX 3纳米晶体的光致发光的特征在于12-42 nm的窄发射线宽、覆盖高达140%的单色标准的宽色域、高达90%的高量子产率和1-29 ns范围内的辐射寿命。增强的光学性质和化学鲁棒性的令人信服的组合使得CsPbX 3纳米晶体对于光电应用具有吸引力，特别是对于蓝色和绿色光谱区域（410-530 nm），其中典型的基于金属硫族化物的量子点遭受光降解。
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 radiative lifetimes in the range of 1–29 ns. 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.
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影响因子：
35
作者：
Meinardi, Francesco;Colombo, Annalisa;Brovelli, Sergio
通讯作者：
Brovelli, Sergio
影响因子：
5.7
作者：
Deschler, Felix;Price, Michael;Friend, Richard H.
通讯作者：
Friend, Richard H.
影响因子：
5
作者：
Supran, Geoffrey J.;Shirasaki, Yasuhiro;Bulovic, Vladimir
通讯作者：
Bulovic, Vladimir
影响因子：
10.8
作者：
Frost JM;Butler KT;Brivio F;Hendon CH;van Schilfgaarde M;Walsh A
通讯作者：
Walsh A
影响因子：
15
作者：
MURRAY, CB;NORRIS, DJ;BAWENDI, MG
通讯作者：
BAWENDI, MG