Bright and fast-response perovskite light-emitting diodes with an ICBA:modified-C60 nanocomposite electrical confinement layer

Chia-Lung Tsai; Yi-Chen Lu; Shou-En Chiang; Chih-Min Yu; Hsin-Ming Cheng; Ching-Ling Hsu; Kuo Yuan Chiu; Sheng Hsiung Chang

doi:10.1039/c9nr10246a

Bright and fast-response perovskite light-emitting diodes with an ICBA:modified-C₆₀ nanocomposite electrical confinement layer

Nanoscale. 2020 Feb 14;12(6):4061-4068. doi: 10.1039/c9nr10246a. Epub 2020 Feb 5.

Authors

Chia-Lung Tsai¹, Yi-Chen Lu², Shou-En Chiang³, Chih-Min Yu², Hsin-Ming Cheng⁴, Ching-Ling Hsu³, Kuo Yuan Chiu⁵, Sheng Hsiung Chang³

Affiliations

¹ Department of Electronic Engineering and Green Technology Research Center, Chang Gung University, Taoyuan 333, Taiwan and Department of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan.
² Department of Electronic Engineering and Green Technology Research Center, Chang Gung University, Taoyuan 333, Taiwan.
³ Department of Physics, Chung Yuan Christian University, Taoyuan 32023, Taiwan. shchang@cycu.edu.tw.
⁴ Organic Electronics Research Center and Department of Electronic Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan.
⁵ Ta Hwa High School, Taoyuan 32660, Taiwan. chiu6993@hotmail.com.

PMID: 32022049
DOI: 10.1039/c9nr10246a

Abstract

Bright and fast-response CH₃NH₃PbBr₃ perovskite light-emitting diodes (PeLEDs) are realized by using ICBA:modified C₆₀ (MC₆₀) nanocomposites as the hole blocking layer (HBL) and electron transport layer (ETL). The photoluminescence spectrum shows that the use of hydrophilic MC₆₀ in the ETL helps the surface passivation of the perovskite layer. In addition, the photoelectron spectra and water-droplet contact angle images show that the use of the ICBA:MC₆₀ nanocomposite ETL can simultaneously confine the electrons and holes in the perovskite layer, which boosts the injected electron-hole radiative recombination efficiency and thereby increases the electroluminescence from 1 cd m^-2 to 2080 cd m^-2 at 6 V when the ICBA:3,5OEC₆₀ nanocomposite ETL is used. In addition, the operational frequency of the optimal PeLED is up to 1.5 MHz.