It is a great pleasure to invite you on behalf of the International, and Local Organizing Committee to join the 23rd International Conference on Photochemical Conversion and Storage of Solar Energy (IPS-23), which will be held in Lausanne SwissTechCenter, from 2nd to 5th August 2022. The IPS conference offers a versatile platform to discuss the latest advances in renewable energy and storage research, and to enhance the regional and international collaborations. The IPS-23 will welcome scientists, engineers, and students from all over the world to enrich their knowledge, interact to spark new ideas, and foster new collaborations and partnerships. The programme will include a combination of Plenary, invited talks, contributing talks, and poster presentations in a meeting which will bring a broad spectrum of the community together to discuss the latest advances in Energy conversion and storage research. The conference will have the scientific and social programme over five full days, with three parallel sessions after plenary talks.