具有高V的中频段间隙,完全非融合电子受体,用于高效率的二进制和三进制有机太阳能电池
Xingjie Wang1, Yaohua Shi1, Miao Li1
1School of Materials Science and Engineering, Henan Normal University, Xinxiang 453007, China.
ACS applied materials & interfaces
|April 29, 2025
概括
为有机太阳能电池 (OSC) 开发了两种新的中频段间隙完全非融合电子受体 (FNEAs). 基于2T-BO-2的装置实现了10.19%的功率转换效率 (PCE),而三元装置达到19.37%的PCE.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 太阳能光伏发电是如何实现的
背景情况:
- 完全非融合电子受体 (FNEAs) 对有机太阳能电池 (OSC) 是有前途的.
- 实现高开放电路电压 (Voc) 和功率转换效率 (PCE) 需要接受器的细致分子设计.
研究的目的:
- 为高性能OSCs开发具有可调节属性的新型中频段间隙FNEAs.
- 研究FNEAs的结构-属性关系及其对设备性能的影响.
主要方法:
- 合成了两个新的FNEAs,2T-BO-1和2T-BO-2,基于一个"-二-"骨架.
- 加入醇基侧链,形成S··O形态锁,控制分子包装.
- 使用开发的FNEAs,制造和表征单节和三元OSC.
主要成果:
- 两种FNEA均表现出中等光学间隙 (~1.70 eV) 和高LUMO水平 (~-3.71 eV),促进了更高的Voc.
- 当与reg-PThE混合时,2T-BO-2表现出优越的薄膜形态,抑制双分子重组,以及平衡的电荷流动性.
- 一个带有2T-BO-2的单连接装置实现了10.19%的PCE和1.00 V的Voc.
- 一个三元装置 (D18:L8-BO:2T-BO-2) 达到了令人印象深刻的19.37%的PCE.
结论:
- 开发的FNEAs为高效的中频段间隙接受器提供了一个可行的策略.
- 侧链工程对于优化OSC中的分子包装,膜形态和充电运输至关重要.
- 该研究提供了一种合理的分子设计方法,用于推进OSC技术.
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