Subscriber access provided by University of Groningen
Article 3
Efficient and Stable Pure Green All-Inorganic Perovskite CsPbBr Light-Emitting Diodes with Solution-Processed NiO Interlayer x
Zhibin Wang, Zhen Luo, Chunyan Zhao, Qiang Guo, Yaping Wang, Fuzhi Wang, Xingming Bian, Ahmed Alsaedi, Tasawar Hayat, and Zhan'ao Tan J. Phys. Chem. C, Just Accepted Manuscript • DOI: 10.1021/acs.jpcc.7b11518 • Publication Date (Web): 29 Nov 2017 Downloaded from http://pubs.acs.org on November 29, 2017
Just Accepted “Just Accepted” manuscripts have been peer-reviewed and accepted for publication. They are posted online prior to technical editing, formatting for publication and author proofing. The American Chemical Society provides “Just Accepted” as a free service to the research community to expedite the dissemination of scientific material as soon as possible after acceptance. “Just Accepted” manuscripts appear in full in PDF format accompanied by an HTML abstract. “Just Accepted” manuscripts have been fully peer reviewed, but should not be considered the official version of record. They are accessible to all readers and citable by the Digital Object Identifier (DOI®). “Just Accepted” is an optional service offered to authors. Therefore, the “Just Accepted” Web site may not include all articles that will be published in the journal. After a manuscript is technically edited and formatted, it will be removed from the “Just Accepted” Web site and published as an ASAP article. Note that technical editing may introduce minor changes to the manuscript text and/or graphics which could affect content, and all legal disclaimers and ethical guidelines that apply to the journal pertain. ACS cannot be held responsible for errors or consequences arising from the use of information contained in these “Just Accepted” manuscripts.
The Journal of Physical Chemistry C is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Published by American Chemical Society. Copyright © American Chemical Society. However, no copyright claim is made to original U.S. Government works, or works produced by employees of any Commonwealth realm Crown government in the course of their duties.
Page 1 of 28 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
The Journal of Physical Chemistry
Efficient and Stable Pure Green All-Inorganic Perovskite CsPbBr3 Light-Emitting Diodes with Solution-Processed NiOx Interlayer
Zhibin Wang1, Zhen Luo1, Chunyan Zhao1, Qiang Guo1, Yaping Wang1, Fuzhi Wang1, Xingming Bian1, Ahmed Alsaedi2, Tasawar Hayat2,3, and Zhan’ao Tan1,*
1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China. 2. Department of Mathematics, Quiad-I-Azam University, Islamabad 44000, Pakistan. 3. NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
1
ACS Paragon Plus Environment
The Journal of Physical Chemistry 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
Page 2 of 28
ABSTRACT: The perovskite-based optoelectronic applications always suffer from stability issues, due to the intrinsic chemical instability of the perovskite materials. Besides, poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is always utilized as anode buffer layer in thin film PeLEDs, which may lead to stability issues due to the hygroscopic and acidic nature of PEDOT:PSS. In this paper, inorganic metal oxide NiOx is employed as hole injection layer (HIL) and hole transport layer (HTL) to substitute detrimental PEDOT:PSS in all-inorganic perovskite light-emitting diodes (PeLEDs). Then fully covered CsPbBr3 polycrystalline films are fabricated by using one-step spin-coating method based on nonstoichiometric and polymer-assisted perovskite precursor solutions. The optimized films not only have compact morphology, but also have excellent photoluminescence quantum yield (PLQY). Encouragingly, by introducing a metal oxide NiOx, the CsPbBr3 PeLEDs show a maximum luminance of 23828 cd m-2 and maximum current efficiency (CE) of 9.54 cd A-1, which lead to 1.6-fold and 3.3-fold increase compared to the PeLEDs with PEDOT:PSS HIL. Besides, the inorganic PeLEDs show high color purity with a full-width at half-maximum (FWHM) of only 16 nm. The combination of inorganic NiOx with inorganic perovskite also shows improved operation stability of devices, which paves the way for highly efficient all-inorganic PeLEDs.
2
ACS Paragon Plus Environment
Page 3 of 28 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
The Journal of Physical Chemistry
1. INTRODUCTION In the past few years, metal trihalide perovskite semiconductors have emerged as a class of fascinating materials, which are widely used in solar cells, light-emitting diodes, photodetectors and lasers.1-5 Three-dimensional perovskite exhibits a chemical stoichiometry of ABX3, where A is the methylammonium (MA), formamidinium (FA), or metal cesium (Cs+) cation, B is an inorganic-metal bivalent cation (Pb2+ or Sn2+), and X is a halide anion (Cl-, Br-, I-). Due to their excellent optical and optoelectronic characteristics, such as narrow full width at half maximum (FWHM) (
