Light-Emitting Electrochemical Cells of Single Crystal Hybrid Halide Perovskite with Vertically Aligned Carbon Nanotubes Contacts

Abstract

Based on the reported ion migration under electric field in hybrid lead halide perovskites we have developed a bright, light emitting electrochemical cell with CH3NH3PbBr3 single crystals directly grown on vertically aligned carbon nanotube (VACNT) forests as contact electrodes. Under the applied electric field, charged ions in the crystal drift and accumulate in the vicinity of the electrodes, resulting in an in operando formed p-i-n heterojunction. The decreased interface energy barrier and the strong charge injection due to the CNT tip enhanced electric field, result in a bright green light emission up to 1800 cd/m2 at room temperature (average = 60 cd/m2). Beyond the light emission, this original device architecture points to the possibility of implementing vertically aligned CNTs as electrodes in operationally-stable perovskite-based optoelectronic devices.

29 pages, 5 figures

References in corpus (4)

• Tuning of the Thermoelectric Figure of Merit of CH${}_3$NH${}_3$MI${}_3$ (M=Pb,Sn) Photovoltaic Perovskites
• Micro-engineered CH${}_3$NH${}_3$PbI${}_3$ nanowire/graphene phototransistor for low intensity light detection at room temperature
• Optically switched magnetism in photovoltaic perovskite CH${}_3$NH${}_3$(Mn:Pb)I${}_3$
• Three-dimensionally Enlarged Photoelectrodes by a Protogenetic Inclusion of Vertically Aligned Carbon Nanotubes into CH3NH3PbBr3 Single Crystals

Cited by in corpus (1)

• Ultrasensitive 3D Aerosol-Jet-Printed Perovskite X-Ray Photodetector