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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 Jsc, Voc and the efficiency. Without incorporation of the co-absorbent, a higher efficiency of around 4.40% is exhibited (Jsc = 9.91 mA cm−2 and Voc = 0.678 V) by the R3 device, while after adding the co-absorbent, we have achieved an efficiency of around 4.44% (Jsc = 10.3 mA cm−2 and Voc = 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 scV 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 -2V 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 -2V 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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