Scholarlink

<p>Bulk heterojunction (BHJ) solar cells based on conjugated polymer/fullerene (PF) blends continue to attract significant research attention. High power conversion efficiencies (PCEs) in this architecture are frequently attained by employing a blend of the narrow-bandgap Poly[N-9′-heptadecanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) donor and the high electron affinity [6,6]-phenyl-C61-butyric acid methyl ester (PC<sub>61</sub>BM) acceptor. Optimizing PCDTBT: PC<sub>61</sub>BM BHJ device performance is necessary for competitive organic solar cell (OSC) efficiency. This study presents the synthesis, spectroscopic characterization, and optoelectronic investigation of a novel thiazole-azo derivative, 2-chloro-4-nitrophenylthiazolylazo-5-methyl-4-(p-tolylhydrazono)pyrazol-3-one (CNTHP), which works as an acceptor in the PCDTBT: PC<sub>61</sub>BM active layer. FTIR, <sup>1</sup>H NMR, and <sup>13</sup>C NMR investigations revealed the effective synthesis of the conjugated CNTHP structure, which promotes extended <i>π</i>–<i>π</i> delocalization through thiazole and azo linkages. Impedance spectroscopy and AC conductivity studies showed a threefold increase in conductivity and a considerable decrease in bulk resistance (<i>R</i><sub>b</sub>), improving charge transfer and reducing recombination losses. The optimized device showed a 27% improvement over the reference device. The CNTHP enhances <i>π</i>–<i>π</i> stacking and exciton dissociation, making it an acceptable ternary acceptor for improving OSC microstructure and charge dynamics.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Thiazole-azo molecular additive for enhanced performance of ternary organic solar cells

  • 期刊论文

  • 发表日期：

    2026年6月1日

查看全文
  • Randa A. Althobiti

摘要

Bulk heterojunction (BHJ) solar cells based on conjugated polymer/fullerene (PF) blends continue to attract significant research attention. High power conversion efficiencies (PCEs) in this architecture are frequently attained by employing a blend of the narrow-bandgap Poly[N-9′-heptadecanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) donor and the high electron affinity [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) acceptor. Optimizing PCDTBT: PC61BM BHJ device performance is necessary for competitive organic solar cell (OSC) efficiency. This study presents the synthesis, spectroscopic characterization, and optoelectronic investigation of a novel thiazole-azo derivative, 2-chloro-4-nitrophenylthiazolylazo-5-methyl-4-(p-tolylhydrazono)pyrazol-3-one (CNTHP), which works as an acceptor in the PCDTBT: PC61BM active layer. FTIR, 1H NMR, and 13C NMR investigations revealed the effective synthesis of the conjugated CNTHP structure, which promotes extended π–π delocalization through thiazole and azo linkages. Impedance spectroscopy and AC conductivity studies showed a threefold increase in conductivity and a considerable decrease in bulk resistance (Rb), improving charge transfer and reducing recombination losses. The optimized device showed a 27% improvement over the reference device. The CNTHP enhances π–π stacking and exciton dissociation, making it an acceptable ternary acceptor for improving OSC microstructure and charge dynamics.