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首页> 外文期刊>RSC Advances >A star-shaped conjugated molecule featuring a triazole core and diketopyrrolopyrrole branches is an efficient electron-selective interlayer for inverted polymer solar cells
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A star-shaped conjugated molecule featuring a triazole core and diketopyrrolopyrrole branches is an efficient electron-selective interlayer for inverted polymer solar cells

机译：具有三唑核和二酮吡咯并吡咯分支的星形共轭分子是用于倒置聚合物太阳能电池的有效电子选择性夹层

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摘要

A novel triazole-cored, star-shaped, conjugated molecule (TDGTPA) has been synthesized for use as an electron-selective interlayer in inverted polymer solar cells (PSCs). This star-shaped molecule comprised a triazole unit as the central core, 2,5-thienyl diketopyrrolopyrrole units as π-conjugated bridges, and tert -butyl-substituted triphenylamine units as both end groups and donor units. The inverted PSC had the device structure indium tin oxide/ZnO/TDGTPA/poly(3-hexylthiophene) (P3HT)/fullerene derivative (PC _(71) BM)/MoO _(3) /Ag. Inserting TDGTPA as the electron-selective layer enhanced the compatibility of the ZnO-based electron transport layer and the P3HT:PC _(71) BM blend-based photoactive layer. The low energy of the lowest unoccupied molecular orbital (?3.98 eV) of TDGTPA was favorable for electron transfer from the photoactive layer to the ZnO layer, thereby enhancing the photovoltaic performance of the PSC. The photo-conversion efficiency of the device incorporating TDGTPA as the electron-selective layer was 15.8% greater than that of the corresponding device prepared without it.
机译：已经合成了新颖的三唑核，星形共轭分子（TDGTPA），用作反向聚合物太阳能电池（PSC）中的电子选择性中间层。该星形分子包含作为中心核心的三唑单元，作为π-共轭桥的2,5-噻吩二酮基吡咯并吡咯单元和作为端基和供体单元的叔丁基取代的三苯胺单元。倒置的PSC的器件结构为氧化铟锡/ ZnO / TDGTPA /聚（3-己基噻吩）（P3HT）/富勒烯衍生物（PC_（71）BM）/ MoO_（3）/ Ag。插入TDGTPA作为电子选择层可增强ZnO基电子传输层与P3HT：PC _（71）BM共混物基光敏层的相容性。 TDGTPA的最低未占据分子轨道的低能量（约3.98 eV）有利于电子从光敏层转移到ZnO层，从而增强PSC的光伏性能。结合了TDGTPA作为电子选择层的器件的光转换效率比没有使用TDGTPA制备的相应器件的光转换效率高15.8％。

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