MACl as a Multirole Additive in Equimolar I/Br Wide‐Bandgap Perovskites: Controlling Halide Segregation and Ensuring Device Stability for Indoor Photovoltaics. - Kim, Eun‐Jung; Heo, Su Min; Do, Ha‐Jeong; Park, Jeonghye; Lee, Khang June; Kim, Jinhyun; Park, Hee Jung; Moon, Taeho (Solar RRL, 2026)