Supporting Information s3

Supporting information

Origin of improved stability in green phosphorescent organic light-emitting diodes based on a dibenzofuran/spirobifluorene hybrid host

Lei Zhang, Shou-Cheng Dong, Chun-Hong Gao, Xiao-Bo Shi, Mei-Feng Xu, Zhao-Kui Wang* and Liang-Sheng Liao*

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China.

*Corresponding author. Fax: +86-512- 6588-2846; Tel: +86-512- 6588-0945; Email: ;

Fig. S1 The ultraviolet photoelectron spectra (UPS)measurement of DBFSF2.

Fig. S2 The PL and absorption spectra of a 50 nm thick DBFSF2 film on quartz.