1. The Beijing Municipal Key Laboratory of New Energy Materials and TechnologiesSchool of Materials Sciences and EngineeringUniversity of Science and Technology Beijing Beijing 100083 P. R. China
2. Sargent Joint Research CenterWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic InformationHuazhong University of Science and Technology (HUST) Wuhan 430074 P. R. China
3. Shenzhen Key Laboratory of Flexible Memory Materials and DevicesCollege of Physics and Optoelectronic EngineeringShenzhen University Shenzhen 518060 P. R. China
4. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Optoelectronic EngineeringShenzhen University Shenzhen 518060 P. R. China
5. Laboratory of Crystal PhysicsKirensky Institute of PhysicsFederal Research Center KSC SB RAS Krasnoyarsk 660036 Russia
6. Department of Engineering Physics and RadioelectronicsSiberian Federal University Krasnoyarsk 660041 Russia
7. Department of PhysicsFar Eastern State Transport University Khabarovsk 680021 Russia
8. State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication MaterialsSouth China University of Technology Guangzhou 510641 P. R. China