Angewandte Chemie - International Edition
Angewandte Chemie - International Edition
4 years ago

Intrinsic Broadband White-Light Emission from Ultrastable, Cationic Lead Halide Layered Materials

Intrinsic Broadband White-Light Emission from Ultrastable, Cationic Lead Halide Layered Materials
Huimin Yang, Honghan Fei, Jinlin Yin, Chengdong Peng, Guiyang Zhang, Zewen Zhuang
We report a family of cationic lead halide layered materials, formulated as [Pb2X2]2+[−O2C(CH)2CO2−] (X=F, Cl, Br), exhibiting pronounced broadband white-light emission in bulk form. These well-defined PbX-based structures achieve an external quantum efficiency as high as 11.8 %, which is comparable to the highest reported value (ca.9 %) for broadband phosphors based on layered organolead halide perovskites. More importantly, our cationic materials are ultrastable lead halide materials, which overcome the air/moisture-sensitivity problems of lead perovskites. In contrast to the perovskites and other bulk emitters, the white-light emission intensity of our materials remains undiminished after continuous UV irradiation for 30 days under atmospheric conditions (ca.60 % relative humidity). Our mechanistic studies confirm that the broadband emission is ascribed to short-range electron-phonon coupling in the strongly deformable lattice and generated self-trapped carriers. White out: Cationic lead halide layered materials formulated as [Pb2X2]2+[−O2C(CH)2CO2−] (X=F, Cl, Br) are ultrastable, broadband white-light emitters with an external quantum efficiency as high as 11.8 % and long-term photostability under atmospheric conditions, which overcome the air/moisture-sensitivity problems of lead perovskites.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201706660

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.