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나노 구조 물리 연구단
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Unveiling the irreversible performance degradation of organo-inorganic halide perovskite films and solar cells during heating and cooling processes

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Title
Unveiling the irreversible performance degradation of organo-inorganic halide perovskite films and solar cells during heating and cooling processes
Author(s)
Abdullah Al Mamun; Tanzila Tasnim Ava; Hye Ryung Byun; Hyeon Jun Jeong; Mun Seok Jeong; Loi Nguyen; Christine Gausin; Gon Namkoong
Publication Date
2017-08
Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.19, no.29, pp.19487 - 19495
Publisher
ROYAL SOC CHEMISTRY
Abstract
While organo-inorganic halide perovskite solar cells show great potential to meet future energy needs, their thermal instability raises serious questions about their commercialization viability. At present, the stability of perovskite solar cells has been studied under various environmental conditions including humidity and temperature. Nonetheless, understanding of the performance of CH3NH3PbI3-xClx perovskite solar cells is limited. This study reports the irreversible performance degradation of CH3NH3PbI3-xClx perovskite solar cells during the heating and cooling processes under AM 1.5 and unveils what triggers the irreversible performance degradation of solar cells. Particularly, the primary cause of the irreversible performance degradation of CH3NH3PbI3-xClx is quantitatively analyzed by monitoring in real time the development of deteriorated crystallinity, charge trapping/detrapping, trap depth, and the PbI2 phase, namely a critical signal of perovskite degradation while varying the temperature of the perovskite films and solar cells. Most surprisingly, it is revealed that the degradation of both perovskite films and solar cells was triggered at similar to 70(circle)C. Remarkably, even after the device temperature cooled down to room temperature, the degraded performance of the solar cells persisted with increasing charge trapping and further development of the PbI2 phase. Identification of the irreversible performance degradation of perovskite solar cells provides guidance for future development of more stable perovskite solar cells. This journal is © the Owner Societies 2017
URI
https://pr.ibs.re.kr/handle/8788114/3835
ISSN
1463-9076
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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