通过光分布控制实现 19.6% 效率的串联有机光伏电池,Advanced Materials

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通过光分布控制实现 19.6% 效率的串联有机光伏电池
Advanced Materials ( IF 27.4 ) Pub Date : 2021-08-08 , DOI: 10.1002/adma.202102787
Jianqiu Wang _{1,

2} , Zhong Zheng ₁ , Yunfei Zu _{1,

3} , Yafei Wang _{1,

3} , Xiaoyu Liu _{1,

4} , Shaoqing Zhang _{1,

4} , Maojie Zhang ₂ , Jianhui Hou _{1,

3,

4}

Affiliation

尽管实现更高光伏性能的潜力更大，但串联有机光伏 (OPV) 电池的最高功率转换效率 (PCE) 仍落后于最先进的单结电池。在这项工作中，通过优化具有低电压损失的光敏层并开发一种调节光场分布的有效方法来制造高效的双结串联 OPV 电池。所研究的串联 OPV 电池结构为氧化铟锡 (ITO)/ZnO/底部光敏层/互连层 (ICL)/顶部光敏层/MoO _x /Ag，其中底部和顶部光敏层基于 PBDB-分别为 TF:ITCC 和 PBDB-TF:BTP-eC11，ICL 是指结构为 MoO _{x 的}互连层/Ag/ZnO:PFN-Br。由于这些结果表明优化底部光敏层的空间不大，因此需要投入更多精力对顶部光敏层进行微调。通过合理调节 PBDB-TF:BTP-eC11 共混薄膜的成分和厚度，发现 300 nm 厚的 PBDB-TF:BTP-eC11 薄膜具有 1:2 D/A 比是理想的顶部光敏层子电池在光伏特性和光分布控制方面。优化后的串联电池实现了 19.64% 的 PCE，这是 OPV 领域的最高结果，并被美国国家计量院认证为 19.50%。

"点击查看英文标题和摘要"

A Tandem Organic Photovoltaic Cell with 19.6% Efficiency Enabled by Light Distribution Control

Despite more potential in realizing higher photovoltaic performance, the highest power conversion efficiency (PCE) of tandem organic photovoltaic (OPV) cells still lags behind that of state-of-the-art single-junction cells. In this work, highly efficient double-junction tandem OPV cells are fabricated by optimizing the photoactive layers with low voltage losses and developing an effective method to tune optical field distribution. The tandem OPV cells studied are structured as indium tin oxide (ITO)/ZnO/bottom photoactive layer/interconnecting layer (ICL)/top photoactive layer/MoO_x/Ag, where the bottom and top photoactive layers are based on blends of PBDB-TF:ITCC and PBDB-TF:BTP-eC11, respectively, and ICL refers to interconnecting layer structured as MoO_x/Ag/ZnO:PFN-Br. As these results indicate that there is not much room for optimizing the bottom photoactive layer, more effort is put into fine-tuning the top photoactive layer. By rationally modulating the composition and thickness of PBDB-TF:BTP-eC11 blend films, the 300 nm-thick PBDB-TF:BTP-eC11 film with 1:2 D/A ratio is found to be an ideal photoactive layer for the top sub-cell in terms of photovoltaic characteristics and light distribution control. For the optimized tandem cell, a PCE of 19.64% is realized, which is the highest result in the OPV field and certified as 19.50% by the National Institute of Metrology.

更新日期：2021-10-01

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