BODIPY derivatives with near infra-red absorption as small molecule donors for bulk heterojunction solar cells.
BODIPY derivatives with near infra-red absorption as small molecule donors for bulk heterojunction solar cells.
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作者：
小供体分子作为有机太阳能电池的活性组分的研究由于这些分子相对于其聚合物对应物具有的一系列优点而继续吸引相当大的关注。本文报道了三种BODIPY小分子供体的合成及太阳能电池的制备。其中两种染料的特征在于三苯胺和吩噻嗪作为连接到BODIPY核的内消旋和α-位的供体单元（TPA-PTZ-DBP和PTZ-TPA-BDP）。此外，我们还合成了一种推拉式衍生物，其特征在于在α-位上具有吩噻嗪部分，在中间位上具有硝基苯（N-TPA-BDP），以研究与其他染料相比，这种类型的官能化对光伏特性的影响。对染料的光电性能进行了研究，发现染料在近红外波段有较宽的吸收，具有较高的消光系数。电化学测量表明染料氧化还原过程具有良好的可逆性。与全供体官能化体系相比，N-TPA-BDP通过DFT证明了广泛的HOMO-LUMO重叠。研究了染料作为本体异质结太阳能电池中的给体分子沿着PC 71 BM一起，并且在最佳给体与受体比下，PTZ-TPA-BDP显示出最高的PCE为1.62%。N-PTZ-BDP：PC 71 BM是在热退火后进一步改善的唯一共混物，达到染料中最高的1.71%的转换效率。观察到的形态组成的精细混合的供体和受体成分的BHJ共混物的三个供体中的每一个在其最佳富勒烯含量。热退火后，PTZ-TPA-BDP：PC 71 BM和TPA-PTZ-DBP：PC 71 BM共混物的这些形态特征基本相同，而N-PTZ-BDP：PC 71 BM的结构域尺寸更大。这些染料表明，BODIPY的吩噻嗪官能化对太阳能电池是有用的，因为它提供了延伸到近红外的强而宽的吸收和具有可逆氧化还原性质的材料-这两者都是有机太阳能电池所需的。我们报告了供体/受体功能化BODIPY衍生物的合成及其作为供体分子在体异质结太阳能电池中的掺入。
The study of small donor molecules as the active component of organic solar cells continues to attract considerable attention due to the range of advantages these molecules have over their polymeric counterparts. Here we report the synthesis and solar cell fabrication of three BODIPY small molecule donors. Two of the dyes feature triphenylamine and phenothiazine as donor units attached to the meso and α-positions of the BODIPY core (TPA-PTZ-DBP and PTZ-TPA-BDP). Additionally, we have synthesised a push–pull derivative featuring phenothiazine moieties in the α-positions and a nitrobenzene in the meso-position (N-TPA-BDP) in order to investigate what effect this type of functionalisation has on the photovoltaic properties compared to the other dyes. The optoelectronic properties were investigated and the dyes showed broad absorption in the near-infrared with high extinction coefficients. Electrochemical measurements indicated good reversibility for the dyes redox processes. In contrast with the all-donor functionalised systems, N-TPA-BDP demonstrated extensive HOMO–LUMO overlap by DFT. The dyes were investigated as donor molecules in bulk heterojunction solar cells along with PC71BM, and under optimal donor to acceptor ratio PTZ-TPA-BDP showed the highest PCE of 1.62%. N-PTZ-BDP:PC71BM was the only blend to further improve upon thermal annealing reaching the highest conversion efficiency among the dyes of 1.71%. A morphology comprised of finely mixed donor and acceptor components is observed for BHJ blends of each of the three donors at their optimum fullerene content. Upon thermal annealing, these morphological features remain mostly the same for PTZ-TPA-BDP:PC71BM and TPA-PTZ-DBP:PC71BM blends whereas for N-PTZ-BDP:PC71BM the domains show a larger size. These dyes show that phenothiazine functionalisation of BODIPY is useful for solar cells because it gives strong and broad absorption extending to the near infra-red and materials with reversible redox properties – both of which are desirable for organic solar cells. We report the synthesis of donor/acceptor functionalised BODIPY derivatives and their incorporation as donor molecules in bulk heterojunction solar cells.
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DOI：
10.1016/j.jphotobiol.2015.02.006
发表时间：
2015-04
影响因子：
5.4
作者：
Gibbs, Jaime H.;Zhou, Zehua;Kessel, David;Fronczek, Frank R.;Pakhomova, Svetlana;Vicente, M. Graca H.
通讯作者：
Vicente, M. Graca H.
影响因子：
4
作者：
Kesavan, Praseetha E.;Gupta, Iti
通讯作者：
Gupta, Iti
影响因子：
41.2
作者：
Baran, Derya;Ashraf, Raja Shahid;McCulloch, Iain
通讯作者：
McCulloch, Iain
一系列基于低聚噻吩的简单低聚物类小分子，用于溶液加工的高效率太阳能电池
影响因子：
15
作者：
Kan, Bin;Li, Miaomiao;Chen, Yongsheng
通讯作者：
Chen, Yongsheng
用于本体异质结太阳能电池的具有 β-炔基化 BODIPY 侧翼的新型 A-D-A 型小分子
影响因子：
3.2
作者：
Liao, Junxu;Xu, Yongjun;Fang, Yutang
通讯作者：
Fang, Yutang