基于咔唑染料敏化剂的合成及电喷雾的DSSC器件制备  

New metal-free organic dye for DSSC devices prepared by electrospray method: synthesis, characterization and device preparation

作　　者：穆丹华 刘杰[2] 王亭[1] 密保秀[2] 高志强[1] 

机构地区：[1]江苏省平板显示与固体照明研究中心,南京邮电大学材料与工程学院,南京210046 [2]有机电子与信息显示国家重点实验室培育基地,南京邮电大学信息材料与纳米技术研究院,南京210046

出　　处：《中国科学：化学》2014年第11期1800-1806,共7页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(61077021;61076016);南京邮电大学基金(NY212076;NY212050)资助

摘　　要：本文设计并合成了两个不含金属的新型纯有机染料CBR和CI,用核磁共振、MALDI-TOF、紫外可见吸收光谱和红外光谱对其结构进行了表征,将其应用到以电喷雾法制备Ti O2光阳极的染料敏化太阳能电池（DSSC）中,并测定了染料在Ti O2光阳极上的吸附量.结果表明,在AM 1.5 G的模拟光照下,基于染料CI的电池有更好的器件性能,短路电流（JSC）、开路电压（VOC）、填充因子（FF）和电池效率（η）分别为5.4 m A/cm2、0.73 V、0.58和2.3%.鉴于纯有机染料CBR和CI在350-450 nm区域的吸收较强,选择染料CBR或CI与传统染料N719共敏化,器件效率由5.2%（N719）分别提高到了5.6%（CBR-N719）和6.7%（CI-N719）.Two new metal-free organic dyes CBR and CI with carbazole as electron-donor, thiophene as π-conjugated bridge and 2-cyanoacrylic acid as electron-acceptor and anchor group have been designed and synthesized. After characterized by 1H NMR, MALDI-TOF, IR and absorption, they were used as sensitizers for DSSCs, in which the Ti O2 anode was prepared by electrospray method. Compared with CBR, the DSSC based on CI showed better performances（JSC, VOC, FF, and η）. Under AM 1.5 G irradiation, its short circuit current increased nearly 2.6 times, with the power conversion efficiency improving from 1.0% to 2.3%. This is mainly due to the reduction of a CH2 in the molecular structure, which increased effective conjugation between donor and acceptor, benefiting for the electron transfer from donor to acceptor as well as lowering the material bandgap. Because CBR and CI have stronger absorption in the region of 350–450 nm, they were selected as co-sensitized dye with the conventional dye N719. The power conversion efficiency improved from 5.2%（N719） to 5.6%（CBR-N719） and 6.7%（CI-N719）.

关 键 词：染料 DSSC 静电喷雾 共敏化 纯有机 

分 类 号：TQ610.42[化学工程—精细化工]