Polymer Acceptor Copolymerized with Luminescent Unit for High-Performance All-Polymer Solar Cells with Low Non-radiative Energy Loss

IF 24.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Advanced Energy Materials Pub Date : 2024-10-19 DOI:10.1002/aenm.202403747

Yiyang Pan, Lingzhi Guo, Min Hun Jee, Guangkuo Dai, Zhongwei Ge, Junjie Zhang, Xiaopeng Duan, Jiali Song, Xiaoming Li, Han Young Woo, Yanming Sun

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Abstract

Reduction of non-radiative energy loss (ΔE_nr) in all-polymer solar cells (all-PSCs) is crucially important for achieving high power conversion efficiencies (PCEs). Herein, an efficient strategy is reported to reduce the ΔE_nr by introducing luminescent unit into the backbone of polymer acceptors. Compared to the device based on PM6:PYDT, the ΔE_nr in all-PSC based on PM6:PYDT-CzP-9 has decreased from 0.188 to 0.183 eV. This reduction is attributed to the improvement in electroluminescence external quantum efficiency (EQE_EL). The PM6:PYDT-CzP-9 device has shown an 18% increase in EQE_EL compared to the device based on PM6:PYDT (8.4 × 10⁻⁴ vs 7.1 × 10⁻⁴), demonstrating that the incorporation of luminescent unit in polymer acceptors is highly effective in enhancing the electroluminescence performance of all-PSCs. As a result, the PM6:PYDT-CzP-9 device yielded a high V_OC of 0.967 V, without the sacrifice of short-circuit current density (23.42 mA cm⁻²) and fill factor (77.5%), leading to a high PCE of 17.55%.

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与发光单元共聚的聚合物受体，用于低非辐射能量损耗的高性能全聚合物太阳能电池

减少全聚合物太阳能电池（all-PSCs）中的非辐射能量损失（ΔEnr）对于实现高功率转换效率（PCEs）至关重要。本文报告了一种通过在聚合物受体骨架中引入发光单元来降低ΔEnr的有效策略。与基于 PM6:PYDT 的器件相比，基于 PM6:PYDT-CzP-9 的全聚苯硫醚器件的 ΔEnr 从 0.188 eV 降至 0.183 eV。这一下降归因于电致发光外部量子效率（EQEEL）的提高。与基于 PM6:PYDT 的器件相比，PM6:PYDT-CzP-9 器件的 EQEEL 提高了 18%（8.4 × 10-4 vs 7.1 × 10-4），这表明在聚合物受体中加入发光单元能非常有效地提高全聚苯乙烯电池的电致发光性能。因此，在不牺牲短路电流密度（23.42 mA cm-2）和填充因子（77.5%）的情况下，PM6:PYDT-CzP-9 器件产生了 0.967 V 的高 VOC，从而实现了 17.55% 的高 PCE。

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来源期刊

Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

41.90

自引率

4.00%

发文量

889

审稿时长

1.4 months

期刊介绍： Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.