| Title |
N,N-Bis(9-methyl-3-carbazolyl)-4-anisidine as an electroactive material for use in perovskite solar cells |
| Authors |
Keruckas, Jonas ; Janasik, Patryk ; Keruckienė, Rasa ; Czulkin, Pawel ; Czichy, Malgorzata ; Lapkowski, Mieczyslaw ; Volyniuk, Dmytro ; Durgaryan, Ranush ; Kim, Byeong Jo ; Boschloo, Gerrit ; Gražulevičius, Juozas Vidas |
| DOI |
10.1021/acsaem.3c00102 |
| Full Text |
|
| Is Part of |
ACS Applied energy materials.. Washington : American Chemical Society. 2023, vol. 6, iss. 11, p. 5720-5728.. ISSN 2574-0962 |
| Keywords [eng] |
DFT ; EIS ; electrooxidation mechanism ; perovskite solar cell ; time-of-flight |
| Abstract [eng] |
Di(9-methyl-3-carbazolyl)-(4-anisyl)amine is presented as an effective hole-transporting material suitable for application in perovskite solar cells. It is obtained by a three-step synthesis from inexpensive starting compounds. It has a relatively high glass transition temperature of 93 °C and thermal stability with 5% weight loss at 374 °C. The compound exhibits reversible double-wave electrochemical oxidation below +1.5 V and polymerization at higher potential. A mechanism for its oxidation is proposed based on electrochemical impedance and electron spin resonance spectroscopy investigations, ultraviolet-visible-near-infrared absorption spectroelectrochemistry results, and density functional theory-based calculations. Vacuum-deposited films of the compound are characterized by a low ionization potential of 5.02 ± 0.06 eV and hole mobility of 10-3 cm2/(Vs) at an electric field of 4 × 105 V/cm. The newly synthesized compound has been used to fabricate dopant-free hole-transporting layers in perovskite solar cells. A power conversion efficiency of 15.5% was achieved in a preliminary study. |
| Published |
Washington : American Chemical Society |
| Type |
Journal article |
| Language |
English |
| Publication date |
2023 |
| CC license |
|
