Recent Advances in Halide Perovskite Photodetectors Based on Different Dimensional Materials

Abstract

Based on the understanding and control of the energy levels and density of defect states of 0D, 1D, 2D, and 3D materials, halide perovskite photodetectors (HPPDs) based on different dimensional materials have recently gained significant achievements. In addition, the detection range of HPPDs even extended from ultraviolet–visible–near infrared (UV–vis–NIR) to X/γ photons, and the self‐powered HPPDs also became a hot issue. In this review, a comprehensive summary of the recent advances in HPPDs based on different dimensional materials is proposed, including 0D, 1D, 2D, and 3D perovskite and nonperovskite (without perovskite ABX3 crystal structure) materials, focusing on the relationship among the charge‐carrier transport, operation mechanism, device architectures, and photodetecting performances. First, an introduction of composition and crystal structures of HPPDs is given, followed by the description of their key figure‐of‐merit parameters evaluation system. Next, the recent developments of HPPDs based on different dimensional materials are highlighted. And finally, the characteristics of HPPDs depending on the dimensionality are summarized, and the potential challenges and approaches for future study are also presented.

Improved performance of perovskite photodetectors with a hybrid planar-mixed heterojunction

“…Organic/inorganic hybrid perovskites have emerged as the active materials for many optoelectronic devices, such as solar cells and light-emitting diodes, due to their merits of direct bandgap, large absorption coefficient, high carrier mobility, long exciton diffusion length, and compatible with various substrates [1][2][3][4][5][6]. Perovskite photodetectors, which have the potential applications in optical communications, environmental monitors, imaging, and chemical/biological sensing, have also attracted more and more attention since the first device demonstrated in 2014 [7][8][9][10][11][12][13][14]. From the structure point of view, there are typically two types perovskite photodetectors, e.g., vertical-and lateral-type devices.…”

Two‐dimensional heterostructure promoted infrared photodetection devices

“…For example, 2DHs can be designed, combining the strength of different materials, for IR photodetection with high responsivity and detectivity simultaneously, which can rarely be achieved for convention photodetectors, because high responsivity usually brings large dark current and thus decreased detectivity. 17 In addition, researchers also fabricated type-II 18 and type-III 19 heterostructures for IR photodetection, achieving broadband photodetection. Owing to strength of above process, 2DHs address issues limiting the development of conventional photodetectors, providing the new strategies to design stateof-the-art photodetectors.…”

Interaction of light with lead halide perovskites: A review

“…[52] The perovskite thin film shows heterogeneous PL comprised of defect-rich dark domains and bright domains that are less defective, because of the heterogeneous distribution of trap states from grain to grain, as shown in Figure 3A, Figure 3C shows the variation of the local emission of different spots over time). [54] The emission of bright spot (red triangle in Figure 3B) only increases by a factor of 1.4, while the dark spot (blue circle in Figure 3B) increases by a factor of 8.7 after through the equation (6,7,8) below. [25,55] MAPbI…”

“…Lead halide perovskites (LHPs), with the chemical formula of APbX3 (A = Cs, CH 3 NH 3 (MA), CH(NH2)2 (FA), X = Cl, Br, I), have emerged as the new generation of intriguing semiconductor materials for solar cells [1][2][3][4] , lasers [5,6] , light emitting diodes [3,5] , and photodetectors [7,8] in recent years. The rapid development of LHPs in these fields arises from the ease of processability, as well as their unique optical and electrical properties, such as small exciton binding energy, long exciton diffusion lengths, low charge recombination, high absorption coefficient, a direct bandgap and its tunability over near-infrared, visible to ultraviolet range.…”