- New ferrocenyl-containing organic hole-transporting materials for perovskite solar cells in regular (n-i-p) and inverted (p-i-n) architectures
-
Three triphenylamine derivatives containing ferrocenyl groups (JW6, JW7 and JW8) were synthesized by facile syntheses. Their HOMO levels match the valence band energy of CH3NH3PbI3. The introduction of ferrocenyl was aimed to obtain hole transporting materials with high mobility for perovskite solar cells. JW7 shows higher hole mobility (4.2 × 10?4 cm2 V?1 s?1) than JW6 (1.3 × 10?4 cm2 V?1 s?1) and JW8 (1.5 × 10?4 cm2 V?1 s?1). Their film-forming properties are affected by their molecule structures. The methoxyl and N,N-dimethyl terminal substituents of JW7 and JW8 are beneficial for having better solubility than JW6. The regular mesoporous TiO2-based perovskite solar cells (n-i-p) and the inverted planar heterojunction perovskite solar cells (p-i-n) fabricated using JW7 show the highest power conversion efficiency of 9.36% and 11.43% under 100 mW cm?2 AM1.5G solar illumination. For p-i-n cells, the standard HTM PEDOT-based cell reaches an efficiency of 12.86% under the same conditions.
- Jia, Jingwen,Duan, Liangsheng,Chen, Yu,Zong, Xueping,Sun, Zhe,Wu, Quanping,Xue, Song
-
p. 216 - 223
(2019/01/16)
-
- Synthesis, optical and electrochemical properties of new ferrocenyl substituted triphenylamine based donor-acceptor dyes for dye sensitized solar cells
-
Two new ferrocenyl substituted triphenylamine based donor-acceptor dyes D1 and D2 were synthesized and used as sensitizers for dye sensitized solar cells (DSSCs). The DSSC based on D2 shows a higher power conversion efficiency of 4.96% as compared to dye D1 (PCE = 3.65%). The higher value of PCE was attributed to the increase in the light harvesting property of dye D2 because of its extended absorption profile up to the near infrared region and a higher value of dye loading on the photoanode surface. The observed value of a higher PCE has also been confirmed by electrochemical impedance data and dark current.
- Misra, Rajneesh,Maragani, Ramesh,Patel,Sharma
-
p. 34904 - 34911
(2014/11/27)
-
- Ferrocenyl substituted triphenylamine based donor-acceptor molecular systems; Synthesis, photophysical, electrochemical, and theoretical studies
-
A series of push-pull molecular systems 5-14 were designed, and synthesized by the Sonogashira cross-coupling, Knoevenagel condensation, and cycloaddition reactions. The donor 'ferrocenyl substituted triphenylamine' was kept constant, whereas the acceptors were varied (malononitrile, indanone, and tetralone). The electronic absorption spectra of the ferrocenyl substituted triphenylamine based donor-acceptor (D-A) compounds 5-9 exhibit intense intramolecular charge transfer (ICT) band in the visible region (415-502 nm). The incorporation of the tetracyanoethylene (TCNE) group in compounds 5-9 results in new D-A system 10-14, which exhibits the ICT band in the region 630-700 nm. The electrochemical studies suggest considerable donor-acceptor interaction. The computational studies reveal strong D-A interaction, and show good agreement with the experimental results.
- Maragani, Ramesh,Misra, Rajneesh
-
p. 3390 - 3399
(2014/05/06)
-