fig10

Figure 10. Characteristics of host-dopant systems and MQWs. (A) Energy alignment of three organic hosts with CsCu₂I₃; (B) PL spectra of perovskite-doped and undoped CsCu₂I₃ using three organic host materials compared with bulk CsCu₂I₃^[145]. Copyright 2021 American Chemistry Society; (C) PL spectra of MAPbCl₃ with and without Coumarin 153 doping^[146]. Copyright 2018 John Wiley & Sons; (D) Schematic illustration of MQW structure formation using single-crystal CsPbBr₃ and three organic materials; (E) Band gap variation as a function of TPBi thickness in single QW structures formed with TPBi and CsPbBr₃; (F) Corresponding changes in PL peak position^[148]. Copyright 2021 John Wiley & Sons. PL: Photoluminescence; MAPbCl₃: methylammonium lead chloride; MA: methylammonium; MQW: multiple quantum well; QW: quantum well; TPBi: 2,2’,2’’-(1,3,5-benzinetriyl)-tris(1-phenyl-1H-benzimidazole).