PHASE CONTROL OF QUASI-2D HALIDE PEROVSKITE BY POST-TREATMENT AND ANTISOLVENT TREATMENT TECHNIQUES СтатьяVerkhogliadov G.A., Ekgardt A.A., Semyonov D.A., Anoshkin S.S., Andreev I.A., Ratmanova N.K., Pushkarev A.P.ST PETERSBURG POLYTECHNIC UNIVERSITY JOURNAL-PHYSICS AND MATHEMATICS. Том 18. 2025.