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1. Sr(Ag _1−x Li _x ) ₂ Se ₂ and [Sr ₃ Se ₂ ][(Ag _1−x Li _x ) ₂ Se ₂ ] Tunable Direct Band Gap Semiconductors

   https://doi.org/10.1002/anie.202301191  

   Zhou, Xiuquan; Wilfong, Brandon; Chen, Xinglong; Laing, Craig; Pandey, Indra R.; Chen, Ying‐Pin; Chen, Yu‐Sheng; Chung, Duck‐Young; Kanatzidis, Mercouri G. (February 2023, Angewandte Chemie International Edition)

   Abstract Synthesizing solids in molten fluxes enables the rapid diffusion of soluble species at temperatures lower than in solid‐state reactions, leading to crystal formation of kinetically stable compounds. In this study, we demonstrate the effectiveness of mixed hydroxide and halide fluxes in synthesizing complex Sr/Ag/Se in mixed LiOH/LiCl. We have accessed a series of two‐dimensional Sr(Ag_1−xLi_x)₂Se₂layered phases. With increased LiOH/LiCl ratio or reaction temperature, Li partially substituted Ag to form solid solutions of Sr(Ag_1−xLi_x)₂Se₂withxup to 0.45. In addition, a new type of intergrowth compound [Sr₃Se₂][(Ag_1−xLi_x)₂Se₂] was synthesized upon further reaction of Sr(Ag_1−xLi_x)₂Se₂with SrSe. Both Sr(Ag_1−xLi_x)₂Se₂and [Sr₃Se₂][(Ag_1−xLi_x)₂Se₂] exhibit a direct band gap, which increases with increasing Li substitution (x). Therefore, the band gap of Sr(Ag_1−xLi_x)₂Se₂can be precisely tuned via fine‐tuningxthat is controlled by only the flux ratio and temperature. 

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2. Copper’s Role in the Photoluminescence of Ag _1–x Cu _x InS ₂ Nanocrystals, from Copper-Doped AgInS ₂ ( x ∼ 0) to CuInS ₂ ( x = 1)

   https://doi.org/10.1021/acs.nanolett.8b04905  

   Hughes, Kira E.; Ostheller, Sarah R.; Nelson, Heidi D.; Gamelin, Daniel R. (January 2019, Nano Letters)
3. Cation Segregation in Alloyed Thiophosphates Fe _2–x Co _x P ₂ S ₆

   https://doi.org/10.1021/acs.chemmater.2c03738  

   Cheng, Matthew; Iyer, Abishek K.; Douvalis, Alexios P.; Ribet, Stephanie M.; Kanatzidis, Mercouri G.; Dravid, Vinayak P. (February 2023, Chemistry of Materials)
4. Solid Solution Yb _2–x Ca _x CdSb ₂ : Structure, Thermoelectric Properties, and Quality Factor

   https://doi.org/10.1021/acs.inorgchem.1c01906  

   Devlin, Kasey P.; Chen, Shunda; Donadio, Davide; Kauzlarich, Susan M. (September 2021, Inorganic Chemistry)
5. Composition, structure, and semiconducting properties of Mg _x Zr _2−x N ₂ thin films

   https://doi.org/10.7567/1347-4065/ab0f0f  

   Bauers, Sage R.; Hamann, Danielle M.; Patterson, Ashlea; Perkins, John D.; Talley, Kevin R.; Zakutayev, Andriy (June 2019, Japanese Journal of Applied Physics)