Polarity effects of ZnO on charge recombination at CsPbBr                         3                          nanoparticles/ZnO interfaces

Dabin Son; Byung Joon Moon; Aram Lee; Hokyun Rho; Hyun Jung Lee; Tae Wook Kim; Jun Seok Ha; Sang Hyun Lee

doi:10.1016/j.apsusc.2019.03.300

Polarity effects of ZnO on charge recombination at CsPbBr ₃ nanoparticles/ZnO interfaces

Dabin Son
, Byung Joon Moon
, Aram Lee
, Hokyun Rho
, Hyun Jung Lee
, Tae Wook Kim
, Jun Seok Ha
, Sang Hyun Lee^*

^*Corresponding author for this work

Department of Flexible and Printable Electronics

Korea Institute of Science and Technology
Chonnam National University
BioNano Health Guard Research Center

Research output: Contribution to journal › Journal article › peer-review

17 Scopus citations

Abstract

We report on the effects of the polarity of ZnO on the transfer of photogenerated electrons at CsPbBr ₃ nanoparticle/ZnO heterojunctions. Closely packed CsPbBr ₃ nanoparticles were coated onto the atomically flat Zn-polar (0001) and O-polar (0001¯) surfaces of ZnO via spin-coating. The photoluminescence intensity of the CsPbBr ₃ nanoparticles on the Zn-polar surface was only half of that of the O-polar surface. The lifetime of radiative emission from the CsPbBr ₃ nanoparticles on the Zn-polar surface also decreased. These results indicate that the polar surface of ZnO clearly affects the recombination of photogenerated electrons from CsPbBr ₃ . This suggests that controlling the polarity of ZnO could be a significant approach for achieving high-efficiency perovskite-based optoelectronic devices, such as light-emitting diodes and photovoltaic devices.

Original language	English
Pages (from-to)	165-169
Number of pages	5
Journal	Applied Surface Science
Volume	483
DOIs	https://doi.org/10.1016/j.apsusc.2019.03.300
State	Published - 2019.07.31

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Charge
Perovskite
Polarity
Recombination
ZnO

Access to Document

10.1016/j.apsusc.2019.03.300

Cite this

@article{7f7322d7eb544c158d2edea00f61b9d5,

title = "Polarity effects of ZnO on charge recombination at CsPbBr 3 nanoparticles/ZnO interfaces",

abstract = " We report on the effects of the polarity of ZnO on the transfer of photogenerated electrons at CsPbBr 3 nanoparticle/ZnO heterojunctions. Closely packed CsPbBr 3 nanoparticles were coated onto the atomically flat Zn-polar (0001) and O-polar (0001¯) surfaces of ZnO via spin-coating. The photoluminescence intensity of the CsPbBr 3 nanoparticles on the Zn-polar surface was only half of that of the O-polar surface. The lifetime of radiative emission from the CsPbBr 3 nanoparticles on the Zn-polar surface also decreased. These results indicate that the polar surface of ZnO clearly affects the recombination of photogenerated electrons from CsPbBr 3 . This suggests that controlling the polarity of ZnO could be a significant approach for achieving high-efficiency perovskite-based optoelectronic devices, such as light-emitting diodes and photovoltaic devices.",

keywords = "Charge, Perovskite, Polarity, Recombination, ZnO",

author = "Dabin Son and Moon, \{Byung Joon\} and Aram Lee and Hokyun Rho and Lee, \{Hyun Jung\} and Kim, \{Tae Wook\} and Ha, \{Jun Seok\} and Lee, \{Sang Hyun\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = jul,

day = "31",

doi = "10.1016/j.apsusc.2019.03.300",

language = "English",

volume = "483",

pages = "165--169",

journal = "Applied Surface Science",

issn = "0169-4332",

}

TY - JOUR

T1 - Polarity effects of ZnO on charge recombination at CsPbBr 3 nanoparticles/ZnO interfaces

AU - Son, Dabin

AU - Moon, Byung Joon

AU - Lee, Aram

AU - Rho, Hokyun

AU - Lee, Hyun Jung

AU - Kim, Tae Wook

AU - Ha, Jun Seok

AU - Lee, Sang Hyun

PY - 2019/7/31

Y1 - 2019/7/31

N2 - We report on the effects of the polarity of ZnO on the transfer of photogenerated electrons at CsPbBr 3 nanoparticle/ZnO heterojunctions. Closely packed CsPbBr 3 nanoparticles were coated onto the atomically flat Zn-polar (0001) and O-polar (0001¯) surfaces of ZnO via spin-coating. The photoluminescence intensity of the CsPbBr 3 nanoparticles on the Zn-polar surface was only half of that of the O-polar surface. The lifetime of radiative emission from the CsPbBr 3 nanoparticles on the Zn-polar surface also decreased. These results indicate that the polar surface of ZnO clearly affects the recombination of photogenerated electrons from CsPbBr 3 . This suggests that controlling the polarity of ZnO could be a significant approach for achieving high-efficiency perovskite-based optoelectronic devices, such as light-emitting diodes and photovoltaic devices.

AB - We report on the effects of the polarity of ZnO on the transfer of photogenerated electrons at CsPbBr 3 nanoparticle/ZnO heterojunctions. Closely packed CsPbBr 3 nanoparticles were coated onto the atomically flat Zn-polar (0001) and O-polar (0001¯) surfaces of ZnO via spin-coating. The photoluminescence intensity of the CsPbBr 3 nanoparticles on the Zn-polar surface was only half of that of the O-polar surface. The lifetime of radiative emission from the CsPbBr 3 nanoparticles on the Zn-polar surface also decreased. These results indicate that the polar surface of ZnO clearly affects the recombination of photogenerated electrons from CsPbBr 3 . This suggests that controlling the polarity of ZnO could be a significant approach for achieving high-efficiency perovskite-based optoelectronic devices, such as light-emitting diodes and photovoltaic devices.

KW - Charge

KW - Perovskite

KW - Polarity

KW - Recombination

KW - ZnO

UR - https://www.scopus.com/pages/publications/85063634599

U2 - 10.1016/j.apsusc.2019.03.300

DO - 10.1016/j.apsusc.2019.03.300

M3 - Journal article

AN - SCOPUS:85063634599

SN - 0169-4332

VL - 483

SP - 165

EP - 169

JO - Applied Surface Science

JF - Applied Surface Science

ER -