“…• Professor Alan Marshall, Florida State University, as the PIER in the field of fossil fuels for his outstanding contribution to the area of petroleum research. For further information, please see the editorial (10.1021/ acs.energyfuels.1c03285)3 of "2021 Pioneers in Energy Research: Alan Marshall" SI and Q&A with Professor Alan Marshall (10.1021/acs.energyfuels.1c03288) 4. • Professor Vivian Yam, The University of Hong Kong, as the PIER in the field of solar energy and conversion of light for her outstanding contribution to the area of novel excited states for organic light-emitting materials/ devices and solar energy conversion.…”