Efficient and tunable white-light emission of metal–organic frameworks by iridium-complex encapsulation

Chun-Yi Sun, Xin-Long Wang, Xiao Zhang, Chao Qin, Peng Li, Zhong-Min Su (), Dong-Xia Zhu, Guo-Gang Shan, Kui-Zhan Shao, Han Wu and Jing Li ()
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Chun-Yi Sun: Key Laboratory of Polyoxometalate, Science of Ministry of Education, Local United Engineering Lab for Power Battery, Northeast Normal University
Xin-Long Wang: Key Laboratory of Polyoxometalate, Science of Ministry of Education, Local United Engineering Lab for Power Battery, Northeast Normal University
Xiao Zhang: Rutgers University, Piscataway
Chao Qin: Key Laboratory of Polyoxometalate, Science of Ministry of Education, Local United Engineering Lab for Power Battery, Northeast Normal University
Peng Li: Key Laboratory of Polyoxometalate, Science of Ministry of Education, Local United Engineering Lab for Power Battery, Northeast Normal University
Zhong-Min Su: Key Laboratory of Polyoxometalate, Science of Ministry of Education, Local United Engineering Lab for Power Battery, Northeast Normal University
Dong-Xia Zhu: Key Laboratory of Polyoxometalate, Science of Ministry of Education, Local United Engineering Lab for Power Battery, Northeast Normal University
Guo-Gang Shan: Key Laboratory of Polyoxometalate, Science of Ministry of Education, Local United Engineering Lab for Power Battery, Northeast Normal University
Kui-Zhan Shao: Key Laboratory of Polyoxometalate, Science of Ministry of Education, Local United Engineering Lab for Power Battery, Northeast Normal University
Han Wu: Key Laboratory of Polyoxometalate, Science of Ministry of Education, Local United Engineering Lab for Power Battery, Northeast Normal University
Jing Li: Rutgers University, Piscataway

Nature Communications, 2013, vol. 4, issue 1, 1-8

Abstract: Abstract Metal–organic frameworks (MOFs) are well known for their tunable structure and porosity. Many studies have shown they are promising for various important applications, for which their performance can be further enhanced by encapsulating functional species, such as luminescent guest molecules, within the frameworks. Although numerous MOFs are luminescent, very few emit white light and their quantum yield is usually low. Here we report a strategy to achieve efficient white-light emission by encapsulating an iridium complex in the MOF cavity. A mesoporous blue-emitting MOF is prepared as host to encapsulate a yellow-emitting iridium complex, [Ir(ppy)2(bpy)]+. The resultant composites emit bright white light with good colour quality (for example, Commission International de I’Eclairage coordinates, colour-rendering index and correlated colour temperature of (0.31, 0.33), 84.5 and 5409 K, respectively), and high quantum yield up to 115 °C. This strategy may open new perspectives for developing high-performance energy-saving solid-state lighting materials.

Date: 2013
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DOI: 10.1038/ncomms3717

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