• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >High open-circuit voltage small-molecule p-DTS(FBTTh2)(2):ICBA bulk heterojunction solar cells - morphology, excited-state dynamics, and photovoltaic performance
【24h】

High open-circuit voltage small-molecule p-DTS(FBTTh2)(2):ICBA bulk heterojunction solar cells - morphology, excited-state dynamics, and photovoltaic performance

机译：高开路电压小分子p-DTS（FBTTh2）（2）：ICBA体异质结太阳能电池-形态，激发态动力学和光伏性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The photovoltaic performance of bulk heterojunction solar cells using the solution-processable small molecule donor 7,7'-(4,4-bis(2-ethylhexyl)-4H-silolo[3,2-b:4,5-b']dithiophene-2,6-diyl)bis(6-fluoro-4-(5'-hexyl-[2,2'-bithiophene]-5-yl)benzo[c][1,2,5]thiadiazole) (p-DTS(FBTTh2)(2) in combination with indene-C60 bis-adduct (ICBA) as an acceptor is systematically optimized by altering the processing conditions. A high open-circuit voltage of 1 V, more than 0.2 V higher than that of a pDTS(FBTTh2)(2):PC70BM blend, is achieved. However, the power conversion efficiency remains around 5% and thus is lower than similar to 8% previously reported for p-DTS(FBTTh2)(2):PC70BM. Transient absorption (TA) pump-probe spectroscopy over a wide spectral (Vis-NIR) and dynamic (fs to mu s) range in combination with multivariate curve resolution analysis of the TA data reveals that generation of free charges is more efficient in the blend with PC70BM as an acceptor. In contrast, blends with ICBA create more coulombically bound interfacial charge transfer (CT) states, which recombine on the sub-nanosecond timescale by geminate recombination. Furthermore, the ns to ms charge carrier dynamics in pDTS(FBTTh2)(2): ICBA blends are only weakly intensity dependent implying a significant contribution of recombination from long-lived CT states and trapped charges, while those in p-DTS(FBTTh2)(2):PC70BM decay via an intensity-dependent recombination mechanism indicating that spatially separated (free) charge carriers are observed, which can be extracted as photocurrent from the device.
机译：使用可溶液处理的小分子供体7,7'-（4,4-双（2-乙基己基）-4H-silolo [3,2-b：4,5-b']的体异质结太阳能电池的光伏性能二噻吩-2,6-二基）双（6-氟-4-（5'-己基-[2,2'-联噻吩] -5-基）苯并[c] [1,2,5]噻二唑）（p通过改变加工条件，系统地优化了-DTS（FBTTh2）（2）与茚-C60双加合物（ICBA）的结合，优化了1 V的高开路电压，比其高0.2 V以上。达到了pDTS（FBTTh2）（2）：PC70BM的混合物，但是功率转换效率保持在5％左右，因此低于先前报道的p-DTS（FBTTh2）（2）：PC70BM的8％。宽光谱（Vis-NIR）和动态（fs至mu s）范围内的吸收（TA）泵浦探针光谱学以及结合TA数据的多变量曲线分辨率分析显示，与PC70BM作为受体，与ICBA混合则产生库仑结合界面电荷转移（CT）状态，通过亚胺重组在亚纳秒级的时间尺度上重新结合。此外，pDTS（FBTTh2）（2）中的ns到ms电荷载流子动力学：ICBA共混物仅弱依赖强度，这表明长寿命CT状态和俘获电荷的复合作用显着，而p-DTS（FBTTh2） （2）：PC70BM通过强度依赖的重组机制衰减，表明观察到了空间分离的（自由）电荷载流子，可以将其作为光电流从器件中提取。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号