A Perylene-Based Conjugated Polymer Endows Perovskite Solar Cells with 85 °C Durability: The Control of Gas Permeation,Advanced Functional Materials

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A Perylene-Based Conjugated Polymer Endows Perovskite Solar Cells with 85 °C Durability: The Control of Gas Permeation
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-10-27 , DOI: 10.1002/adfm.202108855
Yuyan Zhang ₁ , Yutong Ren ₁ , Xinrui Xie ₁ , Yuefang Wei ₁ , Lifei He ₁ , Lingyi Fang ₁ , Jing Zhang ₁ , Yi Yuan ₁ , Peng Wang ₁

Affiliation

Organic–inorganic hybrid perovskites in high-efficiency solar cells are prone to degradation at elevated temperatures, especially in the presence of water moisture. A hole-transporting conjugated copolymer (abbreviated as p-NP-E) characteristic of alternating N-annulated perylene and 3,4-ethylenedioxythiophene backbones, to achieve thermostable perovskite solar cells (PSCs) via controlling gas permeation and thus perovskite decomposition is reported. p-NP-E can be conveniently prepared via Pd-catalyzed direct arylation polycondensation. The air-doped p-NP-E composite film containing nonvolatile 4-tert-butylpyridinium bis(trifluoromethanesulfonyl)imide presents a higher hole mobility and an improved conductivity in comparison with the control based on the state-of-the-art polymer, p-TAA, leading to more efficient PSCs. More critically, the p-NP-E based hole transport layer is not only morphologically more heat-resistant, but also features a lower solubility coefficient and diffusion coefficient of both environmental water molecules and gaseous products such as CH₃I and CH₃NH₂ from the thermal decomposition of perovskite, enabling the fabrication of 21.7%-efficiency, 85 °C durable solar cells.

中文翻译：

一种基于苝的共轭聚合物赋予钙钛矿太阳能电池 85°C 的耐久性：气体渗透的控制

高效太阳能电池中的有机-无机杂化钙钛矿在高温下容易降解，尤其是在存在水分的情况下。报道了一种空穴传输共轭共聚物（缩写为 p-NP-E），具有交替的N环化苝和 3,4-亚乙基二氧噻吩骨架，通过控制气体渗透和钙钛矿分解来实现热稳定钙钛矿太阳能电池（PSC）。p-NP-E可以通过Pd催化的直接芳基化缩聚方便地制备。含非挥发性4-叔的空气掺杂p-NP-E复合膜与基于最先进聚合物 p-TAA 的对照相比，-丁基吡啶鎓双（三氟甲磺酰基）亚胺具有更高的空穴迁移率和更高的电导率，从而产生更有效的 PSC。更关键的是，基于p-NP-E的空穴传输层不仅在形态上更耐热，而且环境水分子和CH ₃ I和CH ₃ NH ₂等气态产物的溶解系数和扩散系数都较低来自钙钛矿的热分解，能够制造效率为 21.7% 的 85°C 耐用太阳能电池。

更新日期：2021-10-27

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