Single crystals of organolead trihalide perovskites (CH3NH3PbI3) are supposed to be one of the most promising materials as photo-detectors. Because of their large absorption coefficient, long-range balanced electron, and hole-transport lengths, it is considered to break through the responsivity and efficiency. To systematically investigate the potentiality as photo-detector, high-quality CH3NH3PbI3 single crystals with large size are highly demanded. In the paper, large CH3NH3PbI3 single crystals with various crystal shapes were grown from γ-butyrolactone. At optimized precursor concentration and growth temperature, the growth rate was fixed at about 0.2 mm h−1. Under such growth conditions, the growth steps, originated from screw dislocation on (100) facet, were revealed to be about 0.45 nm. This value is corresponded to half of the unit cell, implying the slow growth rate of (100) facet. With slow growth rate, the absorption edge of the CH3NH3PbI3 single crystal was extended to 860 nm, correlated with a calculated bandgap of ~1.44 eV. By depositing a pair of Au electrodes, a metal–semiconductor–metal (MSM) photo-detector on the basis of the CH3NH3PbI3 single crystal active layer (3 mm) was fabricated and its photo-response features were investigated systematically. About 2.531 A W−1 responsivity was obtained from the device under 780 nm laser illumination, while the external quantum efficiency reached to 396.20 %, better than some GaN, GaAs, and GaP photo-detectors with a MSM device structure.
External Quantum Efficiency Seed Crystal PbI2 Growth Step High Responsivity
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This work was financially supported by the National Natural Science Foundation of China (No. 51202131), the Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talent (No. 2014RCJJ001), the Fund of State Key Laboratory of Crystal Materials in Shandong University (No. KF1504), the SDUST Research Fund and Joint Innovative Center for Safe and Effective Mining Technology, the Fundamental Research Funds of Shandong University, and Equipment of Coal Resources, Shandong Province (No. 2014JQJH102).
Xing GC, Mathews N, Sun SY et al (2013) Long-range balanced electron and hole transport lengths in organic–inorganic CH3NH3PbI3. Science 342:344–347CrossRefGoogle Scholar
Shi D, Adinolfi V, Comin R et al (2015) Trap-state density and long carrier diffusion in organolead trihalide perovskite single crystals. Science 30:519–522CrossRefGoogle Scholar
Tian WM, Zhao CY, Ment J et al (2015) Visualizing carrier diffusion in individual single-crystal organolead halide perovskite nanowires and nanoplates. J Am Chem Soc 137:12458–12461CrossRefGoogle Scholar
Stranks SD, Eperon GE, Grancini G et al (2013) Electron–hole diffusion lengths exceeding 1 micrometer in an organometal trihalide perovskite absorber. Science 342:341–344CrossRefGoogle Scholar
Nie WY, Tsai H, Asadpour R et al (2015) High-efficiency solution-processed perovskite solar cells with millimeter-scale grains. Science 347:522–525CrossRefGoogle Scholar
Saidaminov MI, Abdelhady AL, Murali B et al (2015) High-quality bulk hybrid perovskite single crystals within minutes by inverse temperature crystallization. Nat Commun 6:7586. doi:10.1038/ncomms8586CrossRefGoogle Scholar
Guo Y, Liu C, Tanaka H et al (2015) Air-stable and solution-processable perovskite photodetectors for solar-blind UV and visible light. J Phys Chem Lett 6:535–539CrossRefGoogle Scholar
Chen HW, Sakai N et al (2015) Switchable high-sensitivity photodetecting and photovoltaic device with perovskite absorber. J Phys Chem Lett 6:1773–1779CrossRefGoogle Scholar
Maculan G, Sheikh AD, Abdelhady AL et al (2015) CH3NH3PbCl3 single crystals: inverse temperature crystallization and visible-blind UV-photodetector. J Phys Chem Lett 6:3781–3786CrossRefGoogle Scholar
Yan KY, Long MZ, Zhang TK et al (2015) Hybrid halide perovskite solar cell precursors: colloidal chemistry and coordination engineering behind device processing for high efficiency. J Am Chem Soc 137:4460–4468CrossRefGoogle Scholar
Leguy AMA, Hu YH, Quiles MC et al (2015) Reversible hydration of CH3NH3PbI3 in films, single crystals, and solar cells. Chem Mater 27:3397–3407CrossRefGoogle Scholar
As DJ, Schmilgus F, Wang C et al (1997) The near band edge photoluminescence of cubic GaN epilayers. Appl Phys Lett 70:1311–1313CrossRefGoogle Scholar
Warner HJ (1988) Schottky barrier and pn-junction I/V plots—small signal evaluation. Appl Phys A 47:291–300CrossRefGoogle Scholar
Averine SV, Kuznetzov PI, Zhitov VA et al (2006) Solar blind MSM-photodetectors based on AlxGa1−xN/GaN heterostructures grown by MOCVD. Solid State Electron 52:618–624CrossRefGoogle Scholar
Wang CK, Chang SJ, Su YK et al (2006) GaN MSM UV photodetectors with titanium tungsten transparent electrodes. IEEE Trans Electron Dev 53:38–42CrossRefGoogle Scholar
Koscielniak WC, Kolbas RM, Littlejohn MA (1988) Performance of a near-infrared GaAs metal–semiconductor–metal (MSM) photodetector with islands. IEEE Electron Dev Lett 9:485–487CrossRefGoogle Scholar
Kim JH, Griem HT, Friedman RA et al (1992) High-performance back-illuminated InGaAs/ln-AlAs MSM photodetector with a record responsivity of 0.96 A/W. IEEE Photon Technol Lett 4:1241–1244CrossRefGoogle Scholar