Poster Sessions

2024 KPS Spring Meeting

Wednesday-Friday, November 4-6, 2020; Virtual Conference
Session P1-ap.4: Organic electronics and photonics
1:00 PM-1:50 PM, Thursday, November 05, 2020
Abstract: P1-ap.403* : Optoelectronic Responses in CH3NH3PbCl3 Perovskite Crystals with of Excitonic Behavior
Jung Hye Ri
(Department of Physics, Ewha Womans University)

JUNG Hye Ri 1, BARI Maryam 2, JO Young Chan 3, KIM Jae Hoon 3, YULDASHEV Shavkat 4, NGUYEN Trang Thi Thu Nguyen 1, KIM Yejin 1, YOON Seokhyun 1, YE Zuo-Guang 2, JO William *1
(1Department of Physics, Ewha Womans University, 2Department of Chemistry, Simon Fraser University, 3Department of Physics, Yonsei University, 4Quantum Functional Semiconductor Research Center, Dongguk University)
Hybrid perovskites are promising optoelectronic materials with its attractive optical and electronical properties. Understanding and controlling the intrinsic properties of this material is important for solving the unsettled questions and advancing the performance of the diverse optoelectronic applications. Determining the excitonic behavior is still unexplored despite being able to predict the optoelectronic properties in semiconductors. At this point, we focused on the investigation of CH3NH3PbCl3 perovskite single crystals which are considered an ideal form without having interfacial effects. We verified the structural properties by using the temperature dependence photoluminescence and transmission spectra. We observed the unusual excitonic behaviors near band edge region through the comparing both. In addition, we determined the surface potential distribution with/without the external light source via Kelvin probe force microscopy. Depending on the various light source, we presented the electronic band structures of perovskite crystal which reveal the semiconducting nature of the materials by consolidating the result values of the band gap energy, the work function, and surface photovoltage. We could suggest the identified perovskite structure and possibility to apply to many optoelectronic devices.

Hybrid perovskite, Signle crystal, Exciton