Suppress energy loss to boost power conversion efficiency of organic photovoltaics with linear side chains modulation

IF 2.7 4区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Organic Electronics Pub Date : 2024-03-09 DOI:10.1016/j.orgel.2024.107019

Haoyu Liu , Tong Shan , Na Yu , Nan Zheng , Liping Zhu , Zaifei Ma , Meifang Zhu

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引用次数: 0

Abstract

The high energy loss (E_loss) in organic solar cells (OSCs) is being the one of major problem, which limit the power conversion efficiency (PCE) of OSCs. In this work, we designed and synthesized three perylene diimide (PDI)-based Acceptor’-Donor-Acceptor-Donor- Acceptor’ (A′-DAD-A′) small molecules namely anti-PDFC-Cx (C8, C10, and C12) by changing the length of linear chains on IDT cores to investigate how the length of linear side chain affects E_loss and the power conversion efficiencies (PCEs) of OSCs. The optical energy bandgap and stacking mode for three anti-PDFC-Cx (C8, C10, and C12) remain the same, which were not influenced by the different lengths of side chains. Increasing the length of side chains on IDT cores from C8 to C10 and C12 would improve the PCE of PM6: anti-PDFC-Cx based devices from 11.52% to 12.43% and 12.27%, particularly the V_oc increasing from 0.98 V of anti-PDFC-C8 and 1.00 V of anti-PDFC-C10 to 1.02 V of anti-PDFC-C12. E_loss analysis indicated the value of E_loss reduced as the length increases from C8, to C12. These results demonstate linear side chain engineer is an effective method to reduce E_loss and realize high PCE on the bases of not modulating the stacking mode of acceptor.

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利用线性侧链调制抑制能量损失，提高有机光伏的功率转换效率

有机太阳能电池（OSCs）中的高能量损失（）是限制 OSCs 功率转换效率（PCE）的主要问题之一。在这项工作中，我们通过改变 IDT 核上线性链的长度，设计并合成了三种基于过二亚胺（PDI）的受体-介体-受体-介体-受体（A′-DAD-A′）小分子，即-PDFC-Cx（C8、C10 和 C12），以研究线性侧链的长度如何影响有机太阳能电池的功率转换效率（PCEs）。三种 -PDFC-Cx（C8、C10 和 C12）的光能带隙和堆叠模式保持不变，不受不同侧链长度的影响。将 IDT 内核上的侧链长度从 C8 增加到 C10 和 C12，可将基于 PM6: -PDFC-Cx 器件的 PCE 从 11.52% 提高到 12.43% 和 12.27%，特别是将 -PDFC-C8 的 0.98 V 和 -PDFC-C10 的 1.00 V 提高到 -PDFC-C12 的 1.02 V。这些结果表明，线性侧链工程是在不改变受体堆叠模式的基础上降低和实现高 PCE 的一种有效方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Organic Electronics 工程技术-材料科学：综合

CiteScore

6.60

自引率

6.20%

发文量

238

审稿时长

44 days

期刊介绍： Organic Electronics is a journal whose primary interdisciplinary focus is on materials and phenomena related to organic devices such as light emitting diodes, thin film transistors, photovoltaic cells, sensors, memories, etc. Papers suitable for publication in this journal cover such topics as photoconductive and electronic properties of organic materials, thin film structures and characterization in the context of organic devices, charge and exciton transport, organic electronic and optoelectronic devices.