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Tuning Excitonic Properties of Pure and Mixed Halide Perovskite Thin Films via Interfacial Engineering

Journal Article · · Advanced Materials Interfaces
 [1];  [1];  [1];  [2];  [2];  [1]
  1. School of Natural Sciences University of California Merced CA 95344 USA
  2. School of Engineering University of California Merced CA 95344 USA
Abstract

The authors explore the potential of ZnO layers of different morphologies, including single crystalline, micro‐structured, and nano‐structured substrates, for tuning exciton binding energy and influencing charge extraction when interfaced with pure (CH 3 NH 3 PbI 3 ) and mixed (CH 3 NH 3 PbI 3− x Cl x ) halide hybrid perovskite (PVSK) thin films. Electron microscopy characterization of the PVSK/ZnO interfaces are correlated with charge transfer properties, probed by means of temperature, power, and time‐resolved photoluminescence (PL) spectroscopy. The results show that at room temperature, the single crystalline ZnO film promotes PL quenching, and reduces recombination lifetime along with exciton density in the PVSK films, all indicative of efficient electron extraction. Nevertheless, the micro‐structured ZnO layers exhibit a mild increase of the PVSK PL at room temperature, and the nano‐structured ZnO enhances PL by up to several thousand‐fold, while simultaneously enhancing recombination rates by 50%. These trends are temperature dependent, and the findings highlight two opposing aspects of how excitonic dissociation in PVSK thin films is affected by the morphology of the underlying ZnO layers. While the single crystalline ZnO can be leveraged as an efficient electron extraction layer for application in photovoltaic devices, the micro‐ and nano‐structured ones offer potential new opportunities for utilization of high quantum yield hybrid perovskites in opto‐electronic platforms.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1441052
Journal Information:
Advanced Materials Interfaces, Journal Name: Advanced Materials Interfaces Journal Issue: 14 Vol. 5; ISSN 2196-7350
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (47)

Controlled Growth of ZnO Nanowires and Their Optical Properties journal May 2002
Morphological Control for High Performance, Solution-Processed Planar Heterojunction Perovskite Solar Cells journal September 2013
Effect of Annealing Temperature on Film Morphology of Organic-Inorganic Hybrid Pervoskite Solid-State Solar Cells journal February 2014
Electrohydrodynamically Assisted Deposition of Efficient Perovskite Photovoltaics journal February 2016
Hybrid Perovskite Thin Films as Highly Efficient Luminescent Solar Concentrators journal September 2016
Efficient Solution-Processed Bulk Heterojunction Perovskite Hybrid Solar Cells journal April 2015
Hall effect and conductivity in zinc oxide (ZnO) doped by thermal diffusion of indium and copper journal February 2010
The Modulation of Optical Property and its Correlation with Microstructures of ZnO Nanowires journal July 2009
Effect of annealing on structural and optical properties of zinc oxide films journal May 2010
Under the spotlight: The organic–inorganic hybrid halide perovskite for optoelectronic applications journal June 2015
Nanowire Perovskite Solar Cell journal February 2015
Highly Efficient Flexible Perovskite Solar Cells Using Solution-Derived NiO x Hole Contacts journal February 2016
Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells journal May 2009
11% Efficient Perovskite Solar Cell Based on ZnO Nanorods: An Effective Charge Collection System journal March 2014
Tailoring 1D ZnO Nanostructure Using Engineered Catalyst Enabled by Poly(4-vinylpyridine) journal August 2014
Key Growth Parameters for the Electrodeposition of ZnO Films with an Intense UV-Light Emission at Room Temperature journal May 2009
Charge Transport and Recombination in Perovskite (CH 3 NH 3 )PbI 3 Sensitized TiO 2 Solar Cells journal August 2013
Enhancement of Perovskite-Based Solar Cells Employing Core–Shell Metal Nanoparticles journal August 2013
Nitrogen-Doped ZnO Nanowire Arrays for Photoelectrochemical Water Splitting journal June 2009
Vacuum-Assisted Thermal Annealing of CH 3 NH 3 PbI 3 for Highly Stable and Efficient Perovskite Solar Cells journal January 2015
Engineering charge transport by heterostructuring solution-processed semiconductors journal May 2017
Efficient planar heterojunction perovskite solar cells by vapour deposition journal September 2013
Compositional engineering of perovskite materials for high-performance solar cells journal January 2015
Coulomb engineering of the bandgap and excitons in two-dimensional materials journal May 2017
Efficient organometal trihalide perovskite planar-heterojunction solar cells on flexible polymer substrates journal November 2013
Correlated electron–hole plasma in organometal perovskites journal September 2014
Ultrasmooth organic–inorganic perovskite thin-film formation and crystallization for efficient planar heterojunction solar cells journal January 2015
Lead halide perovskite nanowire lasers with low lasing thresholds and high quality factors journal April 2015
Bright light-emitting diodes based on organometal halide perovskite journal August 2014
Improved air stability of perovskite solar cells via solution-processed metal oxide transport layers journal October 2015
Perovskite solar cells with a planar heterojunction structure prepared using room-temperature solution processing techniques journal December 2013
High performance organic-inorganic perovskite-optocoupler based on low-voltage and fast response perovskite compound photodetector journal January 2015
Yttrium-substituted nanocrystalline TiO 2 photoanodes for perovskite based heterojunction solar cells journal January 2014
Highly efficient perovskite solar cells based on a nanostructured WO 3 –TiO 2 core–shell electron transporting material journal January 2015
Recent advances in flexible perovskite solar cells journal January 2015
Performance enhancement of planar heterojunction perovskite solar cells by n-doping of the electron transporting layer journal January 2015
Cesium-containing triple cation perovskite solar cells: improved stability, reproducibility and high efficiency journal January 2016
Recent progress in electron transport layers for efficient perovskite solar cells journal January 2016
Low temperature excitonic spectroscopy and dynamics as a probe of quality in hybrid perovskite thin films journal January 2016
Determination of carrier density of ZnO nanowires by electrochemical techniques journal November 2006
Efficient Hybrid Solar Cells Based on Meso-Superstructured Organometal Halide Perovskites journal October 2012
Electron-Hole Diffusion Lengths Exceeding 1 Micrometer in an Organometal Trihalide Perovskite Absorber journal October 2013
Interface engineering of highly efficient perovskite solar cells journal July 2014
High-efficiency solution-processed perovskite solar cells with millimeter-scale grains journal January 2015
Impact of microstructure on local carrier lifetime in perovskite solar cells journal April 2015
Enhanced UV photosensitivity from rapid thermal annealed vertically aligned ZnO nanowires journal August 2011
High Quality Hydrothermal ZnO Crystals journal January 1999

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