LAUSR

Significance Light-driven CO2 reduction into chemical fuels is intriguing for a sustainable carbon economy and global warming. However, the development of ideal CO2-reduction catalysts remains a challenge. In this work, a one-stone-two-birds strategy was reported to improve the CO2-reduction catalyst by introducing the carbazolide coordination site, which owns extended π-conjugation structure and strong electron-donating ability, achieving order-of-magnitude-enhanced performance. To our knowledge, the strategy of introducing a carbazolide coordination site has not been reported for the improvement of catalyst for CO2 photoreduction. More importantly, a notable quantum yield of 11.2% was obtained with an organic photosensitizer, which is the highest value among the CO2 photoreduction systems with a homogeneous organic photosensitizer and a non-noble-metal complex catalyst.