Highly Emissive Green Perovskite Nanocrystals in a Solid State Crystalline Matrix,Advanced Materials

当前位置： X-MOL 学术 › Adv. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Highly Emissive Green Perovskite Nanocrystals in a Solid State Crystalline Matrix
Advanced Materials ( IF 27.4 ) Pub Date : 2017-03-29 06:41:43 , DOI: 10.1002/adma.201605945
Li Na Quan ₁ , Rafael Quintero-Bermudez ₁ , Oleksandr Voznyy ₁ , Grant Walters ₁ , Ankit Jain ₁ , James Zhangming Fan ₁ , Xueli Zheng ₁ , Zhenyu Yang ₁ , Edward H. Sargent ₁

Affiliation

Perovskite nanocrystals (NCs) have attracted attention due to their high photoluminescence quantum yield (PLQY) in solution; however, maintaining high emission efficiency in the solid state remains a challenge. This study presents a solution-phase synthesis of efficient green-emitting perovskite NCs (CsPbBr₃) embedded in robust and air-stable rhombic prism hexabromide (Cs₄PbBr₆) microcrystals, reaching a PLQY of 90%. Theoretical modeling and experimental characterization suggest that lattice matching between the NCs and the matrix contribute to improved passivation, while spatial confinement enhances the radiative rate of the NCs. In addition, dispersing the NCs in a matrix prevents agglomeration, which explains their high PLQY.

中文翻译：

固态晶体基质中的高发射绿色钙钛矿纳米晶体

钙钛矿纳米晶体（NCs）因其在溶液中的高光致发光量子产率（PLQY）而备受关注。然而，保持固态的高发射效率仍然是一个挑战。这项研究提出了一种高效液相发射绿色钙钛矿型NC（CsPbBr ₃）的溶液相合成方法，该方法嵌入到坚固且空气稳定的菱形六溴化棱晶（Cs ₄ PbBr ₆）微晶中，PLQY达到90％。理论建模和实验表征表明，NC和基体之间的晶格匹配有助于改善钝化性能，而空间限制可提高NC的辐射速率。此外，将NC分散在矩阵中可防止结块，这解释了它们的PLQY高。

更新日期：2017-03-30

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南