Superior Performance and Stability of 2D Dion–Jacobson Halide Perovskite Photodetectors Operated under Harsh Conditions without Encapsulation

Abstract

The practical utilization of electronic and optoelectronic materials such as perovskites not only relies on their good device performance and moisture stability but also requires stability under other operating conditions. Herein, the operational stability of the Dion–Jacobson perovskite (DJP) photodetector under different harsh conditions is carefully studied and compared with that of its widely studied counterpart, i.e., the Ruddlesden–Popper perovskite (RPP) photodetector. The DJP‐based photodetector can maintain its responsivity after storage in humid environments for two months and can ensure stable operation without any photocurrent degradation under continuous light illumination for 20 000 s. Moreover, the DJP film does not exhibit any changes in its absorbance spectrum and surface morphology when it is heated at 100 °C for 18 h, and the film is hardly affected by high‐energy electron beam irradiation. In addition, the mechanical stability of the DJP film is also found to be superior based on the cyclic bending measurements of the fabricated flexible photodetectors. The excellent performance and stability of the DJP‐based photodetector are found to be the result of the elimination of weak van der Waals bonds among the octahedral PbI4 layers of DJP films, which is typically observed in RPP films.

Tailoring the Fabrication Method of Dion–Jacobson 2D Halide Perovskites toward Highly Crystalline and Oriented Films

“…Accordingly, the DJ-type perovskites show superior stability to the RP type. [11][12][13][14] Ahmad et al reported that the DJ-type halide perovskites with 1,3-propanediamine as the spacer cations were much more stable than the RP-type. [15] Zhao et al introduced three new conjugated diamine spacer cations to the DJ-type 2D perovskites, which showed enhanced stability.…”

Transition from Dion–Jacobson hybrid layered double perovskites to 1D perovskites for ultraviolet to visible photodetection

“…The highest photodetection parameters obtained in this work are much greater than those of reported HLDP photodetectors (Table S9 †) [14][15][16] and layered DJ perovskites (Table S10 †) [24][25][26][27][28][29][30] and comparable with those of devices based on double perovskites (Cs 2 AgBiBr 6 ; Table S11 †). [31][32][33][34][35] The best performance of (4N4) 2 AgBiBr 8 photodetectors can be explained by their low trap state density (n) and high carrier mobility (m h ) in comparison to the (6N6)SbBr 5 devices.…”

Ag/Reduced Graphene Oxide/Carbon Fiber Composites as Electrodes for Highly Stable and Responsive Marine Electric Field Sensors

“…Among multifarious marine electrodes, the electrochemical Ag/AgCl electrode 7 has attracted much attention because of its high stability and fast response. 8 However, it is difficult to popularize and use it on a large scale due to the disadvantages of harsh storage conditions 9 and expensive raw materials 10 in practical application. However, the capacitive carbon fiber electrode 11 is a promising marine electrode surmounting the deficiency of traditional electrochemical Ag/AgCl electrodes.…”