¹ Department of Materials Engineering, Monash University, Victoria 3800, Australia

² Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China

State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China

Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Institute of Materials Physical Chemistry, Huaqiao University, Quanzhou 362021, China

¹ Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China

² Center of Super-Diamond and Advanced Films and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China

Institute of Organic Chemistry II and Advanced Materials, Ulm University, Albert-Einstein-Allee 11, Ulm D-89081, Germany

Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China

¹ Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109-2122, USA

² Philips Lumileds Lighting Company, San Jose, CA 95131, USA

³ Haosolar Co., Yixing 214213, China

¹ Department of Chemistry, The Hong Kong University of Science and Technology, Hong Kong, China

² Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China

State Key Laboratory of New Ceramics & Fine Processing, Department of Material Science and Engineering, Tsinghua University, Beijing 100084, China

¹ Department of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA

² Department of Chemistry, Kansas State University, Manhattan, KS 66506-3701, USA

School of Chemical Engineering, Department of Energy Science, Sungkyunkwan University, Suwon 440-746, Korea

¹ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

² College of Chemistry, Jilin University, Changchun 130023, China

Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Department of Chemistry, Laboratory of Advanced Materials, Fudan University, Shanghai 200438, China

¹ Department of Chemistry, Wuhan University, Wuhan 430072, China

² Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science & Technology, Shanghai 200237, China

¹ Wuhan National Laboratory for Optoelectronics (WNLO) and College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

² School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China