1. Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
2. Department of Physics, National University of Singapore, 3 Science Drive 3, Singapore 117542
3. SZU-NUS Collaborative Innovation Centre for Optoelectronic Science & Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong 518060, People’s Republic of China
4. Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
5. Department of Chemistry and Biology “A. Zambelli”, University of Salerno, Via Giovanni Paolo II, 132, Fisciano, Salerno 84084, Italy
6. Graduate School of Analytical Science and Technology (GRAST), Chungnam National University, Daejeon 34134, South Korea
7. Kuang Yaming Honors School, Nanjing University, Nanjing, Jiangsu 210023, People’s Republic of China