Tailoring the Energy Landscape in Quasi-2D Halide Perovskites Enables Efficient Green-Light Emission
AuthorsQuan, Li Na
García de Arquer, F. Pelayo
Fan, James Z.
Kim, Dong Ha
Sargent, Edward H.
KAUST DepartmentMaterials Science and Engineering Program
KAUST Grant NumberKUS-11-009-21
Permanent link to this recordhttp://hdl.handle.net/10754/623655
MetadataShow full item record
AbstractOrgano-metal halide perovskites are a promising platform for optoelectronic applications in view of their excellent charge-transport and bandgap tunability. However, their low photoluminescence quantum efficiencies, especially in low-excitation regimes, limit their efficiency for light emission. Consequently, perovskite light-emitting devices are operated under high injection, a regime under which the materials have so far been unstable. Here we show that, by concentrating photoexcited states into a small subpopulation of radiative domains, one can achieve a high quantum yield, even at low excitation intensities. We tailor the composition of quasi-2D perovskites to direct the energy transfer into the lowest-bandgap minority phase and to do so faster than it is lost to nonradiative centers. The new material exhibits 60% photoluminescence quantum yield at excitation intensities as low as 1.8 mW/cm2, yielding a ratio of quantum yield to excitation intensity of 0.3 cm2/mW; this represents a decrease of 2 orders of magnitude in the excitation power required to reach high efficiency compared with the best prior reports. Using this strategy, we report light-emitting diodes with external quantum efficiencies of 7.4% and a high luminescence of 8400 cd/m2.
CitationQuan LN, Zhao Y, García de Arquer FP, Sabatini R, Walters G, et al. (2017) Tailoring the Energy Landscape in Quasi-2D Halide Perovskites Enables Efficient Green-Light Emission. Nano Letters. Available: http://dx.doi.org/10.1021/acs.nanolett.7b00976.
SponsorsThis publication is based in part on work supported by award no. KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. L.N.Q. and D.H.K. acknowledge the financial support by National Research Foundation of Korea Grant funded by the Korean Government (2014R1A2A1A09005656 and 2015M1A2A2058365). F.P.G.d.A. acknowledges financial support from the Connaught fund.
PublisherAmerican Chemical Society (ACS)
- Amplified spontaneous emission in phenylethylammonium methylammonium lead iodide quasi-2D perovskites.
- Authors: Leyden MR, Matsushima T, Qin C, Ruan S, Ye H, Adachi C
- Issue date: 2018 Jun 6
- Control of Interface Defects for Efficient and Stable Quasi-2D Perovskite Light-Emitting Diodes Using Nickel Oxide Hole Injection Layer.
- Authors: Lee S, Kim DB, Hamilton I, Daboczi M, Nam YS, Lee BR, Zhao B, Jang CH, Friend RH, Kim JS, Song MH
- Issue date: 2018 Nov
- Oriented Quasi-2D Perovskites for High Performance Optoelectronic Devices.
- Authors: Yang R, Li R, Cao Y, Wei Y, Miao Y, Tan WL, Jiao X, Chen H, Zhang L, Chen Q, Zhang H, Zou W, Wang Y, Yang M, Yi C, Wang N, Gao F, McNeill CR, Qin T, Wang J, Huang W
- Issue date: 2018 Dec
- Maximizing and stabilizing luminescence from halide perovskites with potassium passivation.
- Authors: Abdi-Jalebi M, Andaji-Garmaroudi Z, Cacovich S, Stavrakas C, Philippe B, Richter JM, Alsari M, Booker EP, Hutter EM, Pearson AJ, Lilliu S, Savenije TJ, Rensmo H, Divitini G, Ducati C, Friend RH, Stranks SD
- Issue date: 2018 Mar 21
- Bright light-emitting diodes based on organometal halide perovskite.
- Authors: Tan ZK, Moghaddam RS, Lai ML, Docampo P, Higler R, Deschler F, Price M, Sadhanala A, Pazos LM, Credgington D, Hanusch F, Bein T, Snaith HJ, Friend RH
- Issue date: 2014 Sep