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清华大学韦国丹、康飞宇&深圳技术大学张光烨&南京大学李永玺《‌‌Joule》|具有热化控制激子管理功能的高效有机光伏器件

  • 2026-07-16 21:59:55
清华大学韦国丹、康飞宇&深圳技术大学张光烨&南京大学李永玺《‌‌Joule》|具有热化控制激子管理功能的高效有机光伏器件
文献分析工具: 科应全球文献AI平台(www.scienceing.com)

单结有机光伏电池(OPV)存在严重的热化损耗问题:高能光子产生的多余能量会以热的形式散失而非转化为电能,这从根本上限制了其效率与稳定性。

为解决这一问题,我们提出了一种通用的热化控制型激子管理策略:在光活性层中引入一种可吸收紫外线(UV)的热激活延迟荧光(TADF)敏化剂 3-(1,1-biphenyl-4-yl)amino)quinolin[3,2,1-de]acridine-5,9-dione(BPhA- QAO)。通过与聚合物供体(PM6/D18)发生特异性非共价分子间耦合,BPhA- QAO 不仅能实现高效的福斯特共振能量转移(FRET),从而高效捕获高能光子并精确调控能级分布以抑制非辐射复合、延长激子寿命;其协同设计还显著降低了热化损耗、减少了能量无序性,并优化了薄膜形貌。

因此,优化后的体异质结器件展现出19.8%的功率转换效率(PCE);而逐层(LbL)器件则实现了20.6%的卓越PCE(认证值为20.18%),同时具备更高的运行稳定性。

图1. BPhA- QAO 的分子设计、光电子特性及FRET验证结果:(A) BPhA- QAO 的分子结构;(B) BPhA- QAO 的优化几何构型及HOMO/ LUMO 能级分布;(C) BPhA- QAO 在甲苯中于300 K和77 K温度下的归一化发射光谱;(D) 石英基底上PM6、 BTP -4F及BPhA- QAO 薄膜的归一化吸收光谱;(E) BPhA- QAO 薄膜的光致发光(PL)光谱与PM6薄膜的吸收光谱;(F、G) BPhA- QAO 、PM6以及PM6:BPhA- QAO(1:0.1,w/w)共混薄膜在350 nm激发波长下的PL光谱,以及 BTP -4F和 BTP -4F:BPhA- QAO(1:0.1,w/w)共混薄膜的PL光谱;(H) 不同PM6添加比例下BPhA- QAO 基共混薄膜的瞬态PL衰减曲线;(I) BPhA- QAO 、PM6及 BTP -4F的能级示意图。

图2. PM6与BPhA- QAO 之间的分子间耦合(A、B):PM6薄膜及PM6:BPhA- QAO(1:0.1,w/w)共混薄膜在77 K至297 K温度范围内随温度变化的光致发光光谱。(C)光致发光强度积分值随倒数温度的变化关系。(D、E)PM6薄膜及PM6:BPhA- QAO(1:0.1,w/w)共混薄膜的二维 GIWAXS 图谱。(F)PM6及PM6:BPhA- QAO(1:0.1,w/w)薄膜沿OOP和IP方向的一维 GIWAXS 分布曲线。

图3. BPhA- QAO 共混薄膜(A和B)中的能级调制与激子动力学调控:在400 nm激发下,PM6及PM6:BPhA- QAO(1:0.1,w/w)薄膜的Tas值;(C)在50 nJ/cm² 400 nm泵浦光激发下,PM6及PM6:BPhA- QAO(1:0.1,w/w)薄膜中单重态激子的动力学行为;(D)基于PM6、PM6:BPhA- QAO(1:0.05,w/w)、PM6:BPhA- QAO(1:0.1,w/w)及PM6:BPhA- QAO(1:0.2,w/w)的薄膜瞬态光致发光衰减曲线;(E和F)在 λ =800 nm激发下,PM6: BTP -4F及PM6: BTP -4F:BPhA- QAO 共混薄膜的Tas值;(G)两种薄膜的ESA(λ =920 nm)光谱动力学特征;(H)电子态的贾布隆斯基图。

图4. BHJ 有机光伏器件的光电性能、热化效应及能量损耗分析:(A)对照组与经BPhA- QAO 处理的PM6: BTP -4F有机光伏器件的J-V曲线;(B) EQE 光谱;(C)对照组与经BPhA- QAO 处理的PM6:L8-BO有机光伏器件的J-V曲线;(D和E)PM6: BTP -4F及PM6: BTP -4F:BPhA- QAO 薄膜的 NIR 热成像图;(F)温度变化曲线;(G)温度变化率(dT/dt)随时间变化曲线;(H和I)实测EL光谱(绿色点)与实验测得的 FTPS - EQE 光谱(蓝色实线);(J)含/不含BPhA- QAO 的PM6: BTP -4F器件的能量损耗。

图5. 优化型有机光伏电池(OPV)中电荷的产生、复合、传输与收集过程:(A和D)暗环境下测得的电流分布曲线;(B和E)白光LED照明下的电流分布曲线;(C和F)PM6: BTP -4F及PM6: BTP -4F:BPhA- QAO 薄膜的电流计数统计分布图;(G)伏安特性曲线随入射光强度的变化关系;(H)施加1 V电压时在暗环境下的奈奎斯特图;(I)光电流密度随有效电压(Jph-Veff)变化的特性曲线。

图6. LbL有机光伏器件中的多功能应用:(A) LbL器件架构示意图;(B) BPhA- QAO 薄膜的光致发光光谱及D18薄膜的吸收光谱;(C) 在350 nm激发波长下,D18及D18:BPhA- QAO(重量比1:0.10)基薄膜的光致发光光谱;(D、E) 经过与未经过BPhA- QAO 处理的D18/L8-BO及D18/L8-BO-X有机光伏器件的J-V曲线;(F) 不同 TADF 添加剂在已报道有机光伏器件中光电转换效率的对比。

期刊:Joule
题目:Efficient organic photovoltaics with thermalization-controlledexciton management
作者:Yuan Li, Zhaoyun Jin, Chuanlin Gao, Zhengfei Wang, Yongxi Li,* Shaokuan Gong, Chengcheng Wu,* Xin Hong, Jiazhi Meng, Tonghui Wang, Zhenghao Liu, Yihui Chen, Xihan Chen, Hongbin Wu, Jiangyu Li, Bin Liu, Xugang Guo, Feiyu Kang,* Guangye Zhang,* and Guodan Wei*
接受日期:First published: 15June 2026
原文链接: https://doi.org/10.1016/j.joule.2026.102520
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  1. CONNECT:[ UseTime:0.000741s ] mysql:host=127.0.0.1;port=3306;dbname=c460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000783s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001985s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000297s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000628s ]
  6. SELECT * FROM `set` [ RunTime:0.006670s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000849s ]
  8. SELECT * FROM `article` WHERE `id` = 623980 LIMIT 1 [ RunTime:0.000428s ]
  9. UPDATE `article` SET `lasttime` = 1784624908 WHERE `id` = 623980 [ RunTime:0.006729s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000323s ]
  11. SELECT * FROM `article` WHERE `id` < 623980 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000482s ]
  12. SELECT * FROM `article` WHERE `id` > 623980 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000414s ]
  13. SELECT * FROM `article` WHERE `id` < 623980 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000655s ]
  14. SELECT * FROM `article` WHERE `id` < 623980 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000836s ]
  15. SELECT * FROM `article` WHERE `id` < 623980 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007095s ]
0.117596s