A Phenoxazine-Based Alternating Copolymer for Efficient and Durable Perovskite Solar Cells,ACS Energy Letters

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A Phenoxazine-Based Alternating Copolymer for Efficient and Durable Perovskite Solar Cells
ACS Energy Letters ( IF 19.3 ) Pub Date : 2024-08-26 , DOI: 10.1021/acsenergylett.4c01905
Bing Zhang ₁ , Lifei He ₁ , Lingyi Fang ₁ , Yaohang Cai ₁ , Yuyan Zhang ₁ , Jing Zhang ₁ , Peng Wang ₁

Affiliation

Developing cost-effective p-type semiconducting polymers with desirable electrical properties and thermal tolerance is essential for the practical application of n-i-p type perovskite solar cells. In this study, we synthesized a semiconducting copolymer, p-POZOD-ENEM, via direct arylation polycondensation. This copolymer features an alternating main chain of phenoxazine, ethylenedioxythiophene, dimethoxynaphthalene, and ethylenedioxythiophene. The theoretical HOMO energy level of p-POZOD-ENEM is 70 meV deeper than that of the homopolymer poly(10-(2-octyldodecyl)phenoxazine-3,7-diyl) (p-POZOD), yet both are comparable to the established material spiro-OMeTAD. Furthermore, p-POZOD-ENEM exhibits higher glass transition temperature, hole mobility, and conductivity than both p-POZOD and spiro-OMeTAD, along with enhanced film morphology. Perovskite solar cells utilizing p-POZOD-ENEM as the hole transport material achieved an average power conversion efficiency of 25.0% and maintained good stability under thermal storage at 85 °C and operation at 45 °C.

中文翻译：

用于高效耐用钙钛矿太阳能电池的吩恶嗪基交替共聚物

开发具有良好电性能和耐热性的经济高效的p型半导体聚合物对于nip型钙钛矿太阳能电池的实际应用至关重要。在这项研究中，我们通过直接芳基化缩聚合成了一种半导体共聚物 p-POZOD-ENEM。该共聚物具有吩恶嗪、亚乙基二氧噻吩、二甲氧基萘和亚乙基二氧噻吩的交替主链。 p-POZOD-ENEM 的理论 HOMO 能级比均聚物聚(10-(2-辛基十二烷基)吩恶嗪-3,7-二基) (p-POZOD) 的理论 HOMO 能级深 70 meV，但两者都与已建立的理论水平相当。材料螺-OMeTAD。此外，p-POZOD-ENEM 比 p-POZOD 和 spiro-OMeTAD 表现出更高的玻璃化转变温度、空穴迁移率和电导率，以及增强的薄膜形态。采用p-POZOD-ENEM作为空穴传输材料的钙钛矿太阳能电池平均功率转换效率达到25.0%，并且在85℃热存储和45℃运行下保持良好的稳定性。

更新日期：2024-08-26

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