[Jinwoo Sim,Sunggyu Ryoo and Takhee Lee] Enhanced Photodetection Performance of In Situ Core/Shell Perovskite-MoS2 Phototransistor (published in ACS Nano)

June 24, 2024l Hit 496

Enhanced Photodetection Performance of In Situ Core/Shell Perovskite-MoS₂ Phototransistor

While two-dimensional transition metal dichalcogenides (TMDCs)-based photodetectors offer prospects for high integration density and flexibility, their thinness poses a challenge regarding low light absorption, impacting photodetection sensitivity. Although the integration of TMDCs with metal halide perovskite nanocrystals (PNCs) has been known promising for photodetection with high absorption coefficient of PNCs, the low charge mobility of PNCs delays efficient photocarrier injection into TMDCs. In this study, we integrated MoS2 with in situ formed core/shell PNCs with short ligands that minimize surface defects and enhance photocarrier injection. The PNCs/MoS2 heterostructure efficiently separates electrons and holes by establishing type II band alignment and consequently inducing a photogating effect. The synergistic interplay between photoconductive and photogating effects yields a high responsivity of 2.2 106 A/W and a specific detectivity of 9.0 1011 Jones. Our findings offer a promising pathway for developing low-cost, high-performance phototransistors leveraging the advantages of 2D materials.

Authors: Jinwoo Sim,|| Sunggyu Ryoo,|| Joo Sung Kim,|| Juntae Jang, Heebeom Ahn, Donguk Kim, Joonha Jung, Taehyun Kong, Hyeonmin Choi, Yun Seog Lee, Tae-Woo Lee,* Kyungjune Cho,* Keehoon Kang,* and Takhee Lee* (||Equally first authors, *co-corresponding authors)

DOI: https://doi.org/10.1021/acsnano.4c02775
Published online: June 21, 2024
Link: https://pubs.acs.org/doi/full/10.1021/acsnano.4c02775

List

News

[Jinwoo Sim,Sunggyu Ryoo and Takhee Lee] Enhanced Photodetection Performance of In Situ Core/Shell Perovskite-MoS2 Phototransistor (published in ACS Nano)