Optimizing the component ratio of PEDOT:PSS by water rinse for high efficiency organic solar cells over 16.7

A new method by water rinse to modify PEDOT:PSS was developed, demonstrating a 16.75% PCE in organic solar cells. [Display omitted] For the state-of-the-art organic solar cells (OSCs), PEDOT:PSS is the most popularly used hole transport material for the conventional structure. However, it still suff...

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Bibliographic Details
Published in:Science bulletin Vol. 65; no. 9; pp. 747 - 752
Main Authors: Li, Qicong, Sun, Yang, Yang, Cheng, Liu, Kong, Islam, Md. Rasidul, Li, Long, Wang, Zhijie, Qu, Shengchun
Format: Journal Article
Language:English
Published: Netherlands Elsevier B.V 15.05.2020
Subjects:
High efficiency
Organic solar cell
PEDOT:PSS
Water rinse
Organic solar cell
High efficiency
Water rinse
PEDOT:PSS
ISSN:2095-9273, 2095-9281, 2095-9281
Online Access:Get full text
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Summary:A new method by water rinse to modify PEDOT:PSS was developed, demonstrating a 16.75% PCE in organic solar cells. [Display omitted] For the state-of-the-art organic solar cells (OSCs), PEDOT:PSS is the most popularly used hole transport material for the conventional structure. However, it still suffers from several disadvantages, such as low conductivity and harm to ITO due to the acidic PSS. Herein, a simple method is introduced to enhance the conductivity and remove the additional PSS by water rinsing the PEDOT:PSS films. The photovoltaic devices based on the water rinsed PEDOT:PSS present a dramatic improvement in efficiency from 15.98% to 16.75% in comparison to that of the untreated counterparts. Systematic characterization and analysis reveal that although part of the PEDOT:PSS is washed away, it still leaves a smoother film and the ratio of PEDOT to PSS is higher than before in the remaining films. It can greatly improve the conductivity and reduce the damage to substrates. This study demonstrates that finely modifying the charge transport materials to improve conductivity and reduce defeats has great potential for boosting the efficiency of OSCs.
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ISSN:2095-9273
2095-9281
2095-9281
DOI:10.1016/j.scib.2019.12.021