Publisher：Photochem  

Perovskite solar cells with an indium tin oxide (ITO)/SnO2/CH3NH3PbI3/Spiro-OMeTAD/2,2,2-trifluoroethanol (TFE) doped single-walled carbon nanotube (SWCNT) structure were developed by dropping TFE onto SWCNTs, which replaced the metal back electrode, and a conversion efficiency of 14.1% was achieved. Traditionally, acidic doping of the back electrode, SWCNT, has been challenging due to the potential damage it may cause to the perovskite layer. However, TFE has facilitated easy doping of SWCNT as the back electrode. The sheet resistance of the SWCNTs decreased and their ionization potential shifted to deeper levels, resulting in improved hole transport properties with a lower barrier to carrier transport. Furthermore, the Seebeck coefficient (S) increased from 34.5 μV/K to 73.1 μV/K when TFE was dropped instead of EtOH, indicating an enhancement in the behavior of p-type charge carriers. It was observed that hydrophilic substances adhered less to the SWCNT surface, and the formation of PbI2 was suppressed. These effects resulted in higher conversion efficiency and improved solar cell performance. Furthermore, the decrease in conversion efficiency after 260 days was suppressed, showing improved durability. The study suggests that combining SWCNTs and TFEs improves solar cell performance and stability.

DOI： 10.3390/photochem4030019

Web of Science

Scopus

Language：English   Publisher：The Chemical Society of Japan  

<p>An evaporable fullerene derivative, indano[60]fullerene ketone, was vacuum-deposited to serve as the electron transport layer in inverted perovskite solar cells. The amorphous nature of the deposited film and the ketone functional group of this fullerene derivative were considered favorable for decreasing the film thickness of the electron transport layer and eliminating the need for a bathocuproine buffer layer.</p>

DOI： 10.1246/cl.230217

Web of Science

Scopus

CiNii Research

Event date： 2024.8

Language：English   Presentation type：Oral presentation (general)  

Country：Korea, Republic of