Three-Dimensional Nanopillar Arrays-Based Efficient and Flexible Perovskite Solar Cells with Enhanced Stability,Nano Letters

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Three-Dimensional Nanopillar Arrays-Based Efficient and Flexible Perovskite Solar Cells with Enhanced Stability
Nano Letters ( IF 9.6 ) Pub Date : 2022-11-17 , DOI: 10.1021/acs.nanolett.2c03694
Yiyi Zhu _{1,

2} , Lei Shu _{1,

2} , Swapnadeep Poddar _{1,

2} , Qianpeng Zhang _{1,

2} , Zhesi Chen _{1,

2} , Yucheng Ding _{1,

2} , Zhenghao Long _{1,

2} , Suman Ma _{1,

3} , Beitao Ren _{1,

2} , Xiao Qiu _{1,

2} , Zhiyong Fan _{1,

2,

4}

Affiliation

Perovskite nanopillars (PNPs) are propitious candidates for solar irradiation harvesting and are potential alternatives to thin films in flexible photovoltaics. To realize efficient daily energy output, photovoltaics must absorb sunlight over a broad range of incident angles and wavelengths congruent with the solar spectrum. Herein, we report highly periodic three-dimensional (3D) PNP-based flexible photovoltaics possessing a core–shell structure. The vertically aligned PNP arrays demonstrate up to 95.70% and 75.10% absorption at peak and under an incident angle of 60°. The efficient absorption and the orthogonal carrier collection facilitate an external quantum efficiency of 84.0%–89.18% for broadband wavelength. PNPs have been successfully implemented in flexible solar cells. The porous alumina membrane protects PNPs against water and oxygen intrusion and thereby imparts robustness to photovoltaic devices. Meanwhile, the excellent tolerance to mechanical stress/strain enables our unique PNP-based device to provide efficient solar-to-electricity conversion while undergoing mechanical bending.

中文翻译：

基于三维纳米柱阵列的高效柔性钙钛矿太阳能电池，稳定性增强

钙钛矿纳米柱 (PNP) 是太阳能辐射收集的理想候选材料，并且是柔性光伏器件中薄膜的潜在替代品。为了实现高效的日常能量输出，光伏电池必须在与太阳光谱一致的广泛入射角和波长范围内吸收太阳光。在此，我们报告了具有核壳结构的高度周期性三维 (3D) 基于 PNP 的柔性光伏器件。垂直对齐的 PNP 阵列在峰值和 60° 入射角下表现出高达 95.70% 和 75.10% 的吸收。有效吸收和正交载流子收集促进了宽带波长的外部量子效率为 84.0%–89.18%。PNP 已成功应用于柔性太阳能电池。多孔氧化铝膜保护 PNP 免受水和氧气的侵入，从而赋予光伏器件坚固性。同时，对机械应力/应变的出色耐受性使我们独特的基于 PNP 的设备能够在进行机械弯曲的同时提供高效的太阳能到电能的转换。

更新日期：2022-11-17

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