Near-infrared polarization-sensitive photodetectionviainterfacial symmetry engineering of an Si/MAPbI₃heterostructural single crystal

Abstract

Methylammonium lead iodide (MAPbI3) single crystals (SCs) have drawn particular attention in the optoelectronic field, due to their outstanding photoelectric performances. However, the structures of those MAPbI3 SCs are isotropic,...

A study on a broadband photodetector based on hybrid 2D copper oxide/reduced graphene oxide

“…In these equations, I ph stands for the photocurrent, P and A are the light intensity and the effective area of the device (0.7 cm 2 ), h and c represents Planck's constant and light's velocity, and l and e are the wavelength and the electron charge, in the given order. [43][44][45] Interestingly, the calculated R and G of our device matched well with the theory:…”

Low Detection Limit Circularly Polarized Light Detection Realized by Constructing Chiral Perovskite/Si Heterostructures

“…It turned out that the dark current of the heterostructure-based device is suppressed for about an order of magnitude as compared with the chiral perovskite-based device, which should attribute to the depletion approximation of the heterostructure (Figure 3a). [34,35] Figure S4 (Supporting Information) shows the broad wavelength current-voltage (I-V) curves of the (R-MPA) 2 MAPb 2 I 7 /Si photodetector measured from 377 to 637 nm under the same light power density of 195 μW cm −2 , for which the peak photoresponse can be observed at 520 nm, consistent with the absorption edge of (R-MPA) 2 MAPb 2 I 7 (2.1 eV, Figure S5, Supporting Information). [21] Thus, we focus on the device performances at 520 nm.…”

“…[26][27][28][29][30][31][32] On the other hand, the depletion region generated at the interface of the heterostructure, resulting in the suppression of dark current, which is beneficial for detecting weak CPL signals. [33][34][35][36] Therefore, it would be a great opportunity for chiral perovskitebased heterostructure to achieve highly sensitive CPL detection with a low detection limit. Considering all above merits, herein, we reported a heterostructure consist of chiral perovskites (R-MPA) 2 MAPb 2 I 7 and Si wafer.…”

Design and Construction of an Optical Communication System: Utilizing High‐Performance Organic–Inorganic Hybrid Perovskite‐Based Photodetectors

“…Wu et al. [ 17 ] constructed a Si/MAPbI 3 heterojunction SPPD, achieving a maximum responsivity of 0.2 A W −1 at a light power density of 2 µW cm −2 . They demonstrated the device's application in polarized light detection for the first time, indicating the potential for significant expansion of photodetector applications.…”