New Random Copolymer Acceptors Enable Additive-Free Processing of 10.1% Efficient All-Polymer Solar Cells with Near-Unity Internal Quantum Efficiency
New Random Copolymer Acceptors Enable Additive-Free Processing of 10.1% Efficient All-Polymer Solar Cells with Near-Unity Internal Quantum Efficiency
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DOI：
10.1021/acsenergylett.9b00460
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发表时间：
2019-05-01
影响因子：
22
通讯作者：
Jenekhe, Samson A.
中科院分区：
文献类型：
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作者：
Kolhe, Nagesh B.;Tran, Duyen K.;Jenekhe, Samson A.
寻找有效的分子设计策略来优化有源层混合形态是开发高效全聚合物太阳能电池(ALL-PSCs)的长期挑战之一。在这里，我们展示了新的双硒/硒连接的萘二亚胺随机共聚物受体BSSx(x=10，20，50)有助于在不使用任何溶液加工添加剂的情况下实现高性能的全PSCs。BSS10与给体聚合物PBDB-T的共混物具有10.1%的功率转换效率、97%的内量子效率和0.59eV的光学带隙能量损耗(E-损耗)。基于BSS10和BSS20的器件具有高的外部量子效率(>；85%)和小的E-L(操作系统)(
Finding effective molecular design strategies to optimize the active layer blend morphology is among the long-standing challenges in developing efficient all-polymer solar cells (all-PSCs). Here we show that new biselenophene/selenophene-linked naphthalene diimide random copolymer acceptors BSSx (x = 10, 20, 50) facilitate the achievement of high-performance all-PSCs without the use of any solution processing additive. Blends of BSS10 with donor polymer PBDB-T combined 10.1% power conversion efficiency with 97% internal quantum efficiency and 0.59 eV optical band gap energy loss (E-loss). BSS10- and BSS20-based devices have the best combination of high external quantum efficiency (>85%) and small E-l(oss) (