Tunable Photoluminescence from Graphene Oxide (pages 6662–6666)
Chih-Tao Chien, Shao-Sian Li, Wei-Jung Lai, Yun-Chieh Yeh, Hsin-An Chen, I-Shen Chen, Dr. Li-Chyong Chen, Dr. Kuei-Hsien Chen, Dr. Takashi Nemoto, Prof. Seiji Isoda, Prof. Mingwei Chen, Dr. Takeshi Fujita, Dr. Goki Eda, Hisato Yamaguchi, Prof. Manish Chhowalla and Prof. Chun-Wei Chen
Article first published online: 23 MAY 2012 | DOI: 10.1002/anie.201200474
Tuning to G(O) flat: Photoluminescence in graphene oxide (GO) suspensions can be tuned from red to blue emission (see scheme) by gradually changing the amounts of sp2- and sp3-bonded carbon atoms through reduction of the surface oxide groups. Electron–hole recombination from two different types of excited states is proposed to explain the luminescence in GO at varying degrees of reduction.