Solid Ligand-Assisted Storage of Air-Stable Formamidinium Lead Halide Quantum Dots via Restraining the Highly Dynamic Surface toward Brightly Luminescent Light-Emitting Diodes
Solid Ligand-Assisted Storage of Air-Stable Formamidinium Lead Halide Quantum Dots via Restraining the Highly Dynamic Surface toward Brightly Luminescent Light-Emitting Diodes
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通过将高动态表面限制为明亮发光的发光二极管，固体配体辅助存储空气稳定的甲脒铅卤化物量子点
DOI：
10.1021/acsphotonics.7b00743
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发表时间：
2017-10-01
期刊：
影响因子：
7
通讯作者：
Sun, Weifu
中科院分区：
文献类型：
--
作者：
Li, Qinghua;Li, Haiyang;Sun, Weifu
尽管有机卤化物钙钛矿对太阳能电池引起了巨大的兴趣，但使用甲米胺铅卤化物钙钛矿作为发射层引起了发光设备的稀缺关注。使用高熔点配体的高发光和空气稳定的甲米铅卤化物钙钛矿量子点已合成。通过组成工程，在409-817 nm的整个可见光谱区域中，发射光谱很容易调节。 FAPBX（3）纳米晶体的光致发光的狭窄发射线宽度为21-34 nm，高量子产率高达88％，而单卤化物FAPBBR（3）的光致发光寿命为54.6-68.6 ns，可能是稳定的几个月。我们已经证明了基于33993 cd M（-2）的中等高亮度的高效甲米酰胺铅卤化物钙钛矿钙钛矿量子点发射二极管，当前效率为20.3 cd a（-1），最大最大量子效率为4.07％。
Although organometal halide perovskites have garnered enormous interest in solar cells, scarce attention has been paid to light-emitting devices using formamidinium lead halide perovskite as the emitting layer. Highly luminescent and air-stable formamidinium lead halide perovskite quantum dots using high-melting-point ligands have been synthesized. Through compositional engineering, the emission spectra are readily tunable over the entire visible spectral region of 409–817 nm. The photoluminescence of FAPbX3 nanocrystals has narrow emission line widths of 21–34 nm, high quantum yields of up to 88%, and a photoluminescence lifetime of 54.6–68.6 ns for single halide FAPbBr3, which could be stable for several months. We have demonstrated the fabrication of highly efficient formamidinium lead halide perovskite quantum dot-based green-light-emitting diodes with a moderately high luminance of 33993 cd m–2, current efficiency of 20.3 cd A–1, and moderately high maximum external quantum efficiency of 4.07%.