Photo-Diodes Based on CH3NH3PbCl3 Perovskite Single Crystals by Epitaxial Growth for Ultraviolet Photo-Detection

Abstract

Organic-inorganic hybrid methylammonium lead halide perovskite MAPbX3 (where MA = CH3NH3, and X = Cl, Br, I) single crystals are potential semiconductors for photo-detection due to their excellent optoelectronic performance. In particular, MAPbCl3 single crystal is a wide-band-gap (2.9 eV) semiconductor which is suitable for ultraviolet (UV) detection. In this work, n−-n+ photo-diodes are fabricated through solution-processed epitaxial growth, growing Bi-doped MAPbCl3 epitaxial layer on MAPbCl3 single crystal substrate. The epitaxial layer effectively improves the interface between n−-type and n+-type layers and leads to low dark current. This work provides useful information for UV detection based on perovskites.

High performance of CH3NH3PbCl3 perovskite single crystal photodetector with a large active area using asymmetrical Schottky interdigital contacts

“…The active area of the device is around 8 mm 2 , which is one of the largest active area for reported CH 3 NH 3 -PbCl 3 single crystal photodetectors. [8][9][10][11][12][13] The crystal structure of the CH 3 NH 3 PbCl 3 single crystal and its powder was characterized by X-ray diffraction (XRD) (Rigaku-D-Max Ra system, with Cu Ka radiation operated at 12 kW). The surface morphology of the CH 3 NH 3 PbCl 3 single crystal was characterized by SU8220 scanning electron microscope (SEM).…”

“…[6][7][8][9][10][11][12][13] At present, some progress has been made in the research of CH 3 NH 3 PbCl 3 single crystal photodetectors. [8][9][10][11][12][13] For example, Hye Ri Jung et al reported that an Ag/TiO 2 /MAPbCl 3 / TiO 2 /Ag structured photodetector presented a responsivity of 0.004 A W À1 and a detectivity of 1.05 Â 10 10 Jones at 430 nm under 2 V bias voltage. 8 Jingda Zhao et al reported that a nÀ-n+ photodiodes based on CH 3 NH 3 PbCl 3 single crystal exhibited a responsivity of 404.7 mA W À1 , and a detectivity of 4.87 Â 10 11 Jones at 20V.…”

“… 8 Jingda Zhao et al reported that a n−–n+ photo-diodes based on CH 3 NH 3 PbCl 3 single crystal exhibited a responsivity of 404.7 mA W −1 , and a detectivity of 4.87 × 10 11 Jones at 20V. 9 Giacomo Maculan et al reported that Pt/CH 3 NH 3 PbCl 3 single crystal/Ti/Au vertical structured visible-blind UV-photodetector was fabricated. 10 The active area of the device was about 4 mm 2 .…”

“…single crystal lm exhibited a detectivity of $10 12 Jones and a fast rise/decay response time of 9.7/8.8 ms. 5 Among the organic-inorganic hybrid perovskites, CH 3 NH 3 PbCl 3 perovskite single crystal is regarded as an attractive candidate for UV detection due to its large direct bandgap of $2.85 eV. [6][7][8][9][10][11][12][13] At present, some progress has been made in the research of CH 3 NH 3 PbCl 3 single crystal photodetectors. [8][9][10][11][12][13] For example, Hye Ri Jung et al reported that an Ag/TiO 2 /MAPbCl 3 / TiO 2 /Ag structured photodetector presented a responsivity of 0.004 A W À1 and a detectivity of 1.05 Â 10 10 Jones at 430 nm under 2 V bias voltage.…”

Organic–Inorganic Lead Halide Perovskite Single Crystal: From Synthesis to Applications

“…However, the thickness of the single crystals will limit the carrier extraction and transmission capacity, and the final device performance and responsiveness are poor. At present, a variety of solution methods have been developed to prepare perovskite single−crystal thin films, which mainly consist of an epitaxial growth method and space−confined methods [ 17 , 18 ]. At present, the growth methods of single crystals are mainly used in ITC [ 19 ], the solution temperature lowering method (SLT) [ 20 ], the antisolvent vapor diffusion crystallization method (AVC) [ 21 ], the solution evaporation method (SE) [ 22 ], and so on.…”