Bandgap Renormalization in Monolayer MoS2 on CsPbBr3 Quantum Dots via Charge Transfer at Room Temperature

• DOI: 10.1002/admi.202000835
• Publication Date: 2020-09-21T11:20:02Z
• Authors: Subash Adhikari; Ji‐Hee Kim; Bumsub Song; Manh‐Ha Doan; Minh Dao Tran; Leyre Gomez; Hyun Kim; Hamza Zad Gul; Ganesh Ghimire; Seok Joon Yun; Tom Gregorkiewicz; Young Hee Lee
• Keywords: MoS 2 monolayers; Technology; Physics; QC1-999; T; charge transfer; 02 engineering and technology; 7. Clean energy; CsPbBr 3 quantum dots; room temperature; 0210 nano-technology; bandgap renormalization

Abstract Many‐body effect and strong Coulomb interaction in monolayer transition metal dichalcogenides lead to intrinsic bandgap shrinking, originating from the renormalization of electrical/optical bandgap, exciton binding energy, spin‐orbit splitting. This phenomenon has been commonly observed at low temperature requires high photon excitation density. Here, augmented (BGR) MoS 2 anchored on CsPbBr 3 perovskite quantum dots room via charge transfer is presented. The amount electrons significantly transferred gives rise large plasma screening . heterostructure red‐shifted by 84 meV with minimal pump fluence, highest BGR temperature, which saturates a further increase fluence. Further, it found that magnitude inversely relates Thomas–Fermi length. provides plenty explore within existing vast libraries van der Waals toward practical devices such as solar cells, photodetectors, light‐emitting‐diodes.