School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou, China.
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou, China.
ACS Appl Mater Interfaces. 2016 May 18;8(19):12377-83. doi: 10.1021/acsami.6b00084. Epub 2016 May 5.
Sulfonated-acetone-formaldehyde (SAF) was grafted with alkali lignin (AL) to prepare grafted sulfonated-acetone-formaldehyde lignin (GSL). Considering the rich phenolic hydroxyl groups in GSL, we detected a hole mobility of 2.27 × 10(-6) cm(2) V(-1) s(-1) with GSL as a hole transport material by space-charge-limited current model. Compared with nonconjugated poly(styrene sulfonic acid), GSL was applied as p-type semiconductive dopant for PEDOT to prepare water-dispersed
GSL.
GSL shows enhanced conductivity compared with that of
PSS. Simultaneously, the enhanced open-circuit voltage, short-circuit current density, and fill factor are achieved using
GSL as a hole extract layer (HEL) in sandwich-structure inverted perovskite solar cells. The power conversion efficiency is increased to 14.94% compared with 12.6% of
PSS-based devices. Our results show that amorphous GSL is a good candidate as dopant of PEDOT, and we provide a novel prospective for the design of HEL based on lignin, a renewable biomass and phenol derivatives.
将磺化丙酮甲醛（SAF）接枝到碱木质素（AL）上，制备接枝磺化丙酮甲醛木质素（GSL）。考虑到 GSL 中丰富的酚羟基，我们通过空间电荷限制电流模型检测到以 GSL 为空穴传输材料的空穴迁移率为 2.27×10(-6)cm(2)V(-1)s(-1)。与非共轭聚苯乙烯磺酸相比，GSL 被用作 PEDOT 的 p 型半导体掺杂剂，以制备水分散性 PEDOT:GSL。与 PEDOT:PSS 相比，PEDOT:GSL 显示出增强的电导率。同时，使用 PEDOT:GSL 作为夹层倒置钙钛矿太阳能电池的空穴提取层（HEL），可以实现开路电压、短路电流密度和填充因子的增强。功率转换效率从基于 PEDOT:PSS 的器件的 12.6%提高到 14.94%。我们的结果表明，无定形 GSL 是 PEDOT 的良好掺杂剂，为基于木质素的 HEL 的设计提供了新的前景，木质素是一种可再生生物质和酚类衍生物。
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