Efficiency above 12% for 1 cm2 Flexible Organic Solar Cells with Ag/Cu Grid Transparent Conducting Electrode,Advanced Science

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Efficiency above 12% for 1 cm2 Flexible Organic Solar Cells with Ag/Cu Grid Transparent Conducting Electrode
Advanced Science ( IF 14.3 ) Pub Date : 2019-09-30 , DOI: 10.1002/advs.201901490
Yunfei Han _{1,

2} , Xiaolian Chen _{1,

2} , Junfeng Wei _{1,

2} , Guoqi Ji _{1,

2} , Chen Wang _{1,

2} , Wenchao Zhao ₃ , Junqi Lai _{1,

2} , Wusong Zha _{1,

2} , Zerui Li _{1,

2} , Lingpeng Yan _{1,

2} , Huiming Gu _{1,

2} , Qun Luo _{1,

2} , Qi Chen _{1,

2} , Liwei Chen _{1,

2} , Jianhui Hou ₃ , Wenming Su _{1,

2} , Chang-Qi Ma _{1,

2}

Affiliation

With the rapid progress of organic solar cells (OSCs), improvement in the efficiency of large‐area flexible OSCs (>1 cm²) is crucial for real applications. However, the development of the large‐area flexible OSCs severely lags behind the growth of the small‐area OSCs, with the electrical loss due to the large sheet resistance of the electrode being a main reason. Herein, a high conductive and high transparent Ag/Cu composite grid with sheet resistance <1 Ω sq⁻¹ and an average visible light transparency of 84% is produced as the transparent conducting electrode of flexible OSCs. Based on this Ag/Cu composite grid electrode, a high efficiency of 12.26% for 1 cm² flexible OSCs is achieved. The performances of large‐area flexible OSCs also reach 7.79% (4 cm²) and 7.35% (9 cm²), respectively, which are much higher than those of the control devices with conventional flexible indium tin oxide electrodes. Surface planarization using highly conductive PEDOT:PSS and modification of the ZnO buffer layer by zirconium acetylacetonate (ZrAcac) are two necessary steps to achieve high performance. The flexible OSCs employing Ag/Cu grid have excellent mechanical bending resistance, maintaining high performance after bending at a radius of 2 mm.

中文翻译：

采用银/铜栅透明导电电极的 1 cm2 柔性有机太阳能电池效率高于 12%

随着有机太阳能电池（OSC）的快速发展，提高大面积柔性OSC（>1 cm ² ）的效率对于实际应用至关重要。然而，大面积柔性OSC的发展严重滞后于小面积OSC的发展，其中电极大的薄层电阻造成的电损耗是主要原因。本文制备了高导电、高透明的Ag/Cu复合栅极，其方块电阻为<1 Ω sq ^-1 ，平均可见光透明度为84%，作为柔性OSC的透明导电电极。基于这种Ag/Cu复合栅电极，1 cm ²柔性OSC实现了12.26%的高效率。大面积柔性OSC的性能也分别达到7.79%（4 cm ² ）和7.35%（9 cm ² ），远高于传统柔性氧化铟锡电极的控制器件。使用高导电性 PEDOT:PSS 进行表面平坦化以及使用乙酰丙酮锆 (ZrAcac) 对 ZnO 缓冲层进行改性是实现高性能的两个必要步骤。采用Ag/Cu栅极的柔性OSC具有优异的抗机械弯曲性能，在半径为2毫米的弯曲后仍能保持高性能。

更新日期：2019-10-01

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