AUTHOR=Hirata Shuzo , Reineke Sebastian , Patra Abhijit , Yuan Wang Zhang TITLE=Editorial: Metal-free room-temperature phosphorescence JOURNAL=Frontiers in Chemistry VOLUME=10 YEAR=2022 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2022.1025674 DOI=10.3389/fchem.2022.1025674 ISSN=2296-2646