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首页> 外文期刊>RSC Advances >Low band gap diketopyrrolopyrrole-based small molecule bulk heterojunction solar cells: influence of terminal side chain on morphology and photovoltaic performance
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Low band gap diketopyrrolopyrrole-based small molecule bulk heterojunction solar cells: influence of terminal side chain on morphology and photovoltaic performance

机译：低带隙二维吡咯哒rol-基小分子散装异质结太阳能电池：终端侧链对形态和光伏性能的影响

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摘要

Two new low band gap small molecules BDT(DPP-TTHex) _(2) and BDT(DPP-TT) _(2) with different terminal side chain are designed and synthesized for bulk heterojunction solar cells. BDT(DPP-TTHex) _(2) is flanked by hexyl at head and tail of backbone while BDT(DPP-TT) _(2) is free attachment. Both small molecules exhibit similar optical, electrochemical properties and charge carrier mobilities. Nevertheless, BDT(DPP-TT) _(2) performs optimal film morphology leading to higher short circuit current ( J _(SC) ) comparing with BDT(DPP-TTHex) _(2) , thus 5.12% power conversion efficiencies (PCE) of BDT(DPP-TT) _(2) is achieved, higher than 2.36% PCE of BDT(DPP-TTHex) _(2) under AM1.5G illumination (100 mW cm ~(?2) ).
机译：具有不同端子侧链的两个新的低频隙小分子BDT（DPP-Tthex）_（2）和BDT（DPP-TT）_（2）是为散装异质结太阳能电池的制作和合成的。 BDT（DPP-Tthex）_（2）在BDT（DPP-TT）_（2）是自由附着的同时，骨干和骨干头的己基。两种小分子都表现出类似的光学，电化学性能和电荷载流子迁移率。然而，BDT（DPP-TT）_（2）执行最佳胶片形态，导致与BDT（DPP-Tthex）_（2）相比的较高电路电流（J _（SC）），从而进行5.12％的功率转换效率（PCE ）BDT（DPP-TT）_（2）在AM1.5G照明下的BDT（DPP-THEX）_（2）的高于2.36％PCE（100mW cm〜（α2））。

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