Fabrication of D–π–A sensitizers based on different donors substituted with a dihydropyrrolo[3,4-c]pyrrole-1,4-dione bridge for DSSCs: influence of the CDCA co-absorbent,New Journal of Chemistry

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Fabrication of D–π–A sensitizers based on different donors substituted with a dihydropyrrolo[3,4-c]pyrrole-1,4-dione bridge for DSSCs: influence of the CDCA co-absorbent
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2018-06-05 00:00:00 , DOI: 10.1039/c8nj00847g
Abhishek Dhar _{1,

2,

3,

4,

5} , Nadavala Siva Kumar _{1,

6,

7,

8} , Mohammad Asif _{1,

6,

7,

8} , Rohit L. Vekariya _{9,

10,

11,

12,

13}

Affiliation

The effect of co-absorbance on the performance of DSSC devices with a new design of dimer sensitizers possessing a 2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione (DPP) bridge and various donor groups (carbazole, diphenyl amine, indole) is reported in the present work. The co-absorbent (CDCA = chenodeoxycholic acid) was inserted into the sensitizers and the photovoltaic performance was studied. The co-absorbent had a significant effect on J_sc, V_oc and the efficiency. Without incorporation of the co-absorbent, a higher efficiency of around 4.40% is exhibited (J_sc = 9.91 mA cm⁻² and V_oc = 0.678 V) by the R3 device, while after adding the co-absorbent, we have achieved an efficiency of around 4.44% (J_sc = 10.3 mA cm⁻² and V_oc = 0.693 V). Structure optimization and energy level calculations were carried out by density functional theory (DFT) with different donor substituents and DPP bridge based sensitizers. The co-absorbent and sensitizer based DSSCs were also characterised by impedance spectroscopy and incident photon to current conversion efficiency measurements.

中文翻译：

基于不同供体的D–π–A增敏剂的制备，用二氢吡咯并[3,4- c ]吡咯-1,4-二酮桥取代了DSSC ：CDCA共吸收剂的影响

新设计的具有2,5-二氢吡咯并[3,4- c ]吡咯-1,4-二酮（DPP）桥和各种供体基团的二聚体敏化剂对共吸收对DSSC器件性能的影响（二苯胺，吲哚）已报道在本工作中。将共吸收剂（CDCA =鹅去氧胆酸）插入敏化剂中，并研究了光伏性能。共吸收剂对J _sc，V _oc和效率有显着影响。如果不掺入共吸收剂，则显示出约4.40％的更高效率（J _sc = 9.91 mA cm ^-2和V _oc通过R3设备获得= 0.678 V），而在添加共吸收剂之后，我们获得了约4.44％的效率（J _sc = 10.3 mA cm ^-2和V _oc = 0.693 V）。结构优化和能级计算是通过密度泛函理论（DFT）使用不同的供体取代基和基于DPP桥的敏化剂进行的。基于吸收剂和增敏剂的DSSC的特征还在于阻抗谱和入射光子至电流转换效率的测量。

更新日期：2018-06-05

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