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나노 구조 물리 연구단
나노구조물리 연구단
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Management of transition dipoles in organic hole-transporting materials under solar irradiation for perovskite solar cells

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Title
Management of transition dipoles in organic hole-transporting materials under solar irradiation for perovskite solar cells
Author(s)
Song Ah Ok; Bonghyun Jo; Sivaraman Somasundaram; Hwi Je Woo; Dae Woon Lee; Zijia Li; Bong-Gi Kim; Jong H. Kim; Young Jae Song; Tae Kyu Ahn; Sanghyuk Park; Hui Joon Park
Publication Date
2018-10
Journal
NATURE COMMUNICATIONS, v.9, no.1, pp.4537 -
Publisher
NATURE PUBLISHING GROUP
Abstract
In organic hole-transporting material (HTM)-based p-i-n planar perovskite solar cells, which have simple and low-temperature processibility feasible to flexible devices, the incident light has to pass through the HTM before reaching the perovskite layer. Therefore, photo-excited state of organic HTM could become important during the solar cell operation, but this feature has not usually been considered for the HTM design. Here, we prove that enhancing their property at their photo-excited states, especially their transition dipole moments, can be a methodology to develop high efficiency p-i-n perovskite solar cells. The organic HTMs are designed to have high transition dipole moments at the excited states and simultaneously to preserve those property during the solar cell operation by their extended lifetimes through the excited-state intramolecular proton transfer process, consequently reducing the charge recombination and improving extraction properties of devices. Their UV-filtering ability is also beneficial to enhance the photostability of devices. © The Author(s) 2018
URI
https://pr.ibs.re.kr/handle/8788114/5114
ISSN
2041-1723
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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