Characterizing the Thickness Distribution of Donor and Acceptor in Organic Photovoltaics via Quasi-Monochromatic Light Transmittance

Chang，Jingyu1; Zhang，Guoxin1; Zhang，Chuwei1; Xu，Chenghao1; Xia，Huihui1,2; Deng，Weiwei1; Zhao，Xinyan1,3

2024

10.1002/adom.202302693

Advanced Optical Materials   影响因子和分区

2195-1071

The performance of organic solar cells is sensitive to the film thickness and the uniformity of the donor and acceptor distribution in the photoactive layer. Especially, in the quasi-planar heterojunction fabricated by layer-by-layer process, the donor and acceptor materials may be non-homogeneously distributed across the entire photoactive layer. Visualization of the spatial distributions of donor and acceptor components sheds light on the relationship between nanostructures and device performances. Based on the distinct infrared absorption characteristics of the organic donor and acceptor, a quasi-monochromatic light transmittance (QMLT) technique is proposed to quantify the donor and/or acceptor thickness in the photoactive layer blend across the entire device area with nanometer precision. The variation in thickness of donor and acceptor can be clearly and separately revealed. Accordingly, the impacts of spin coating techniques (such as dynamic or static dispensing, and on-center or off-center spin coating), as well as solvent choices, on film morphology and device performance can be correlated by the noncontact, nondestructive, and convenient QMLT method.

film thickness distribution organic photovoltaics quasi-monochromatic light transmittance quasi-planar heterojunction

SCI ; EI

英语

第一 ; 通讯

2-s2.0-85182719124

Scopus

1.Shenzhen Key Laboratory of Soft Mechanics & Smart Manufacturing,Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology (SUSTech),Shenzhen,518055,China
2.Shenzhen Jinxin Technology Co.,Ltd,Shenzhen,518108,China
3.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology (SUSTech),Shenzhen,518055,China

Chang，Jingyu,Zhang，Guoxin,Zhang，Chuwei,et al. Characterizing the Thickness Distribution of Donor and Acceptor in Organic Photovoltaics via Quasi-Monochromatic Light Transmittance[J]. Advanced Optical Materials,2024,12(13).

Chang，Jingyu.,Zhang，Guoxin.,Zhang，Chuwei.,Xu，Chenghao.,Xia，Huihui.,...&Zhao，Xinyan.(2024).Characterizing the Thickness Distribution of Donor and Acceptor in Organic Photovoltaics via Quasi-Monochromatic Light Transmittance.Advanced Optical Materials,12(13).

Chang，Jingyu,et al."Characterizing the Thickness Distribution of Donor and Acceptor in Organic Photovoltaics via Quasi-Monochromatic Light Transmittance".Advanced Optical Materials 12.13(2024).