Triphenyl based on HTMS --H101, H111, H112
H101: Grimsdale et al., synthesized and characterized another new electron-rich molecule HTM 26 based on a 3,4-ethylenedioxythiophene core structure. The absorption maximum was located at 404 nm, which was red shifted by 20 nm compared to spiro-OMeTAD (385 nm). A higher Voc was observed, due to the lowering of the HOMO level and enhancement of the FF by improving the charge transport properties. The PSSC device fabricated with HTM 26 (without doping) gave a PCE of 10.6%. The addition of 5% FK102 to the HTM 26 device gave a PCE of 12.6%. The PCE was improved to 13.8% by varying the concentration (15%) of the dopant FK102, with a higher Voc and FF. The well known spiro-OMeTAD showed a Jsc of 18.9 mA cm−2, a Voc of 1.05 V, a FF of 0.69 and gave a PCE 13.7% under similar fabrication conditions.
Hole-Transporting Small Molecules Based on Thiophene Cores for High Efficiency Perovskite Solar Cells
Hairong Li,[a] Kunwu Fu,[a] Pablo P. Boix,[a] Lydia H. Wong,[a] Anders Hagfeldt,[b] Michael Grtzel,[c] Subodh G. Mhaisalkar,*[a] and Andrew C. Grimsdale*[a]
Two new electron-rich molecules, 2,3,4,5-tetra[4,4'-bis(methoxyphenyl)aminophen-4"-yl]-thiophene (H111) and 4,4',5,5'- tetra[4,4'-bis(methoxyphenyl)aminophen-4"-yl]-2,2'-bithiophene (H112), which contain thiophene cores with arylamine side groups, are reported. When used as the hole-transporting material (HTM) in perovskite-based solar cell devices, power conversion efficiencies of up to 15.4 % under AM 1.5G solar simulation were obtained. This is the highest efficiency achieved with HTMs not composed of 2,2',7,7'-tetrakis(N,N'-di-p-methoxyphenylamine)-9,9'-spirobifluorene (spiro-OMeTAD) and its isomers. Both HTMs, especially H111, have great potential to replace expensive spiro-OMeTAD given their much simpler and less expensive syntheses.Download Attachment
|Molecular Formula:||C72H14O2||Synonyms:||[6,6]PCBM; PCBM, PC61BM|