首页|Enhancement of vertical phase separation in sequentially deposited organic photovoltaics through the independent processing of additives

Enhancement of vertical phase separation in sequentially deposited organic photovoltaics through the independent processing of additives

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Herein,the impact of the independent control of processing additives on vertical phase separation in sequentially deposited(SD)organic photovoltaics(OPVs)and its subsequent effects on charge carrier kinetics at the electron donor-acceptor interface are investigated.The film morphology exhibits notable variations,significantly depending on the layer to which 1,8-diiodooctane(DIO)was applied.Grazing incidence wide-angle X-ray scattering analysis reveals distinctly separated donor/acceptor phases and vertical crystallinity details in SD films.Time-of-flight secondary ion mass spectrometry analysis is employed to obtain component distributions in diverse vertical phase structures of SD films depending on additive control.In addition,nanosecond transient absorption spectroscopy shows that DIO control significantly affects the dynamics of separated charges in SD films.In SD OPVs,DIO appears to act through distinct mechanisms with minimal restriction,depending on the applied layer.This study emphasizes the significance of morphological optimization in improving device performance and underscores the impor-tance of independent additive control in the advancement of OPV technology.

Sequential depositionVertical phase separationCharge dynamicsOrganic photovoltaicsNonfullerene acceptors

Damin Lee、Changwoo Park、Gayoung Ham、Young Yong Kim、Sung-Nam Kwon、Junyeong Lee、Sungjin Jo、Seok-In Na、Hyojung Cha

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Department of Hydrogen and Renewable Energy,Kyungpook National University,Daegu 41566,Republic of Korea

Department of Energy Convergence and Climate Change,Kyungpook National University,Daegu 41566,Republic of Korea

Pohang Accelerator Laboratory(PAL),Pohang University of Science and Technology(POSTECH),Pohang,Gyeongbuk 37673,Republic of Korea

Department of Flexible and Printable Electronics,Jeonbuk National University,Jeonju-si,Jeollabuk-do 54896,Republic of Korea

School of Energy Engineering,Kyungpook National University,Daegu 41566,Republic of Korea

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National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)

RS-2023-00213920NRF-2021R1A4A1031761

2024

10.1016/j.jechem.2024.03.028

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.94(7)