Systematic anode engineering enabling universal efficiency improvements in organic solar cells

IF 5.4 1区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY GIANT Pub Date : 2024-08-30 DOI:10.1016/j.giant.2024.100338
Kwok Kiu Tsang , Han Yu , Joshua Yuk Lin Lai , Ho Ming Ng , Chung Hang Kwok , Wenzhao Xiong , Huawei Hu , He Yan
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Abstract

Anode modification and optimization is crucial towards improving performance of organic solar cells (OSCs). PEDOT:PSS is the most common choice as a hole transport layer (HTL) material, but suffers from issues including low conductivity. In this work, three alkyl amine derivatives - methylamine hydrochloride (MA), ethylamine hydrochloride (EA) and propylamine hydrochloride (PA) are doped into the commercially available Al 4083 PEDOT:PSS to form PEDOT:PSS-MA, PEDOT:PSS-EA and PEDOT:PSS-PA, as modified HTLs. All these modified HTLs exhibit improved chemical and electrical properties including work functions (WF), conductivities and charge carrier motilities. The alkyl amine doping shows compatibility in both Small Molecular Acceptors and All-Polymer OSCs. With PEDOT:PSS-MA demonstrates a highest PCE of 18.49 % compared to the 17.84 % of OSC devices prepared with pristine PEDOT:PSS with the PM6:L8-BO system, while PM6:PY-IT all-polymer OSCs improve PCE from 14.53 % to 15.22 %. AFM characterizations reveal that the introduction of the dopants have smoothened the surface morphology of spin-coated HTL films, which contributes towards more efficient charge extraction. In summary, this study not only presents a method of improving OSC efficiencies, but also provides insight and further possible directions towards anode optimization of OSCs.

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系统化阳极工程可普遍提高有机太阳能电池的效率
阳极改性和优化对提高有机太阳能电池(OSC)的性能至关重要。PEDOT:PSS 是最常用的空穴传输层(HTL)材料,但存在导电率低的问题。在这项工作中,三种烷基胺衍生物--甲胺盐酸盐(MA)、乙胺盐酸盐(EA)和丙胺盐酸盐(PA)被掺杂到市售的 Al 4083 PEDOT:PSS 中,形成 PEDOT:PSS-MA、PEDOT:PSS-EA 和 PEDOT:PSS-PA 作为改性 HTL。所有这些改性 HTL 都具有更好的化学和电气性能,包括功函数(WF)、电导率和电荷载流子运动。烷基胺掺杂显示了小分子受体和全聚合物 OSC 的兼容性。与使用原始 PEDOT:PSS 和 PM6:L8-BO 系统制备的 17.84% 的 OSC 器件相比,PEDOT:PSS-MA 的 PCE 最高达 18.49%,而 PM6:PY-IT 全聚合物 OSC 的 PCE 则从 14.53% 提高到 15.22%。原子力显微镜表征显示,掺杂剂的引入使旋涂 HTL 薄膜的表面形貌更加平滑,这有助于提高电荷萃取的效率。总之,这项研究不仅提出了一种提高 OSC 效率的方法,还为优化 OSC 的阳极提供了深入的见解和更多可能的方向。
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来源期刊
GIANT
GIANT Multiple-
CiteScore
8.50
自引率
8.60%
发文量
46
审稿时长
42 days
期刊介绍: Giant is an interdisciplinary title focusing on fundamental and applied macromolecular science spanning all chemistry, physics, biology, and materials aspects of the field in the broadest sense. Key areas covered include macromolecular chemistry, supramolecular assembly, multiscale and multifunctional materials, organic-inorganic hybrid materials, biophysics, biomimetics and surface science. Core topics range from developments in synthesis, characterisation and assembly towards creating uniformly sized precision macromolecules with tailored properties, to the design and assembly of nanostructured materials in multiple dimensions, and further to the study of smart or living designer materials with tuneable multiscale properties.
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