Disentanglement of Degradation Mechanisms by Analyzing Aging Dynamics of Environmentally Friendly Processed Polymer Solar Cells,Energy Technology

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Disentanglement of Degradation Mechanisms by Analyzing Aging Dynamics of Environmentally Friendly Processed Polymer Solar Cells
Energy Technology ( IF 3.6 ) Pub Date : 2020-06-05 , DOI: 10.1002/ente.202000116
Shahidul Alam _{1,

2} , Md. Moidul Islam _{1,

2} , Shadia Chowdhury _{1,

2} , Rico Meitzner _{1,

2} , Christian Kästner ₃ , Ulrich S. Schubert _{1,

2} , Harald Hoppe _{1,

2}

Affiliation

Lifecycle assessments suggest preventing halogenated solvents or solvent additives for environmentally friendly polymer solar cells. Thus, the active layers of polymer:fullerene bulk heterojunction solar cells based on poly{[4,8‐bis‐(2‐ethyl‐hexyl‐thiophene‐5‐yl)‐benzo[1,2‐b:4,5‐b0]dithiophene‐2,6‐diyl]‐alt‐[2‐(20‐ethyl‐hexanoyl)‐thieno[3,4‐b]thiophen‐4,6‐diyl]} (PBDTTT‐CT) and the fullerene derivative [6,6]‐phenyl‐C70‐butyric acid methyl ester (PC₇₀BM) are cast from m‐xylene solutions. Ortho‐vanilline is used as a nonhazardous and nontoxic solvent additive. Completed photovoltaic devices are subjected to accelerated laboratory weathering tests. Photovoltaic parameters are periodically obtained from current–voltage recordings of the solar cells twice an hour under well‐defined aging conditions following the International Summit on Organic Photovoltaic Stability (ISOS) protocols. An analysis of aging kinetics reveals the superposition of two individual degradation mechanisms, of which one is assigned to continued intermixing and the other one to the formation of a blocking layer by interfacial segregation.

中文翻译：

通过分析环境友好型聚合物太阳能电池的老化动力学来分解降解机理

生命周期评估表明，应防止卤化溶剂或溶剂添加剂用于环保型聚合物太阳能电池。因此，基于聚{[4,8-双-（2-乙基-己基-噻吩-5-基）-苯并[1,2-b：4,5- b0] dithiophene-2,6-diyl] alt [2-（20-乙基己基）噻吩并[3,4-b]噻吩-4,6-diyl]}（PBDTTT-CT）和富勒烯衍生物[6,6] -苯基C70丁酸甲酯（PC ₇₀ BM）是从浇注米二甲苯溶液。邻香兰碱被用作无害且无毒的溶剂添加剂。完整的光伏设备要经过加速的实验室耐候性测试。根据国际有机光伏稳定性峰会（ISOS），在明确定义的老化条件下，每小时两次从太阳能电池的电流-电压记录中定期获取光伏参数。对老化动力学的分析揭示了两种单独的降解机理的叠加，其中一种降解机理被指定为继续混合，另一种降解机理是通过界面偏析形成阻挡层。

更新日期：2020-06-05

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