RT Journal Article T1 Lead‐free halide perovskite materials and optoelectronic devices: progress and prospective A1 López Fernández, Iago A1 Valli, Donato A1 Wang, Chun‐Yun A1 Samanta, Subarna A1 Okamoto, Takuya A1 Huang, Yi‐Teng A1 Sun, Kun A1 Liu , Yang A1 Chirvony, Vladimir S. A1 Patra, Avijit A1 Zito, Juliette A1 De Trizio, Luca A1 Gaur , Deepika A1 Sun, Hong‐Tao A1 Xia, Zhiguo A1 Li, Xiaoming A1 Zeng, Haibo A1 Mora‐Seró, Iván A1 Pradhan, Narayan A1 Martínez‐Pastor, Juan P. A1 Müller‐Buschbaum, Peter A1 Biju, Vasudevanpillai A1 Debnath, Tushar A1 Saliba, Michael A1 Debroye, Elke A1 Hoye, Robert L. Z. A1 Infante, Ivan A1 Manna, Liberato A1 Polavarapu , Lakshminarayana K1 3312 Tecnología de Materiales AB Halide perovskites, in the form of thin films and colloidal nanocrystals, have recently taken semiconductor optoelectronics research by storm, and have emerged as promising candidates for high‐performance solar cells, light‐emitting diodes (LEDs), lasers, photodetectors, and radiation detectors. The impressive optical and optoelectronic properties, along with the rapid increase in efficiencies of solar cells and LEDs, have greatly attracted researchers across many disciplines. However, most advances made so far in terms of preparation (colloidal nanocrystals and thin films), and the devices with highest efficiencies are based on Pb‐based halide perovskites, which have raised concerns over their commercialization due to the toxicity of Pb. This has triggered the search for lower‐toxicity Pb‐free halide perovskites and has led to significant progress in the last few years. In this roadmap review, researchers of different expertise have joined together to summarize the latest progress, outstanding challenges, and future directions of Pb‐free halide perovskite thin films and nanocrystals, regarding their synthesis, optical spectroscopy, and optoelectronic devices, to guide the researchers currently working in this area as well as those that will join the field in the future. PB Advanced Functional Materials SN 1616301X YR 2024 FD 2024-02-05 LK http://hdl.handle.net/11093/7592 UL http://hdl.handle.net/11093/7592 LA eng NO Advanced Functional Materials, 34(6): 2307896 (2024) NO Agencia Estatal de Investigación | Ref. RYC2018-026103-I DS Investigo RD 14-ene-2025