Deposition of large-area organic solar cells based on poly-3-hexylthiophene with double ETL

• Published in: Materials today communications 2023-06, Vol.35, p.106421, Article 106421
• Main Authors: Solís-Vivanco, J.F., Arenas-Arrocena, M.C., Mayén-Hernández, S.A., De Moure-Flores, F., Santos-Cruz, J.
• Format: Article
• Language: English
• Subjects: Double electron transport layer; Electrical impedance; Large-area solar cells; Organic solar cell; Shunt and series resistances
• ISSN: 2352-4928; 2352-4928
• DOI: 10.1016/j.mtcomm.2023.106421

Solar cells with FTO/TiO2/PFN/P3HT:PC61BM/MoO3/Ag configuration were built with different areas: 0.03, 0.25, 1, 4, 9, 16, and 25 cm2. In addition, Solar devices of 4 and 25 cm2 of total area were built interconnecting solar cells of 1 cm2 of area. With the results obtained, it was possible to establish a correlation, and an efficiency trend line concerning the area was estimated. The cell with the highest efficiency was the one of size 0.03 cm2 with Jsc of 12.32 mA/cm2, Voc of 0.59 volts, FF of 0.58, PCE of 4.23 %, with an EQE of 33.5 %, Vbi of 0.60 volts, Rs of 52.15 ohms, Rsh of 212.40 × 103 ohms and Na-Nd of 0.07 × 1025 1/cm3. The largest cell (25 cm2) considerably decreased its efficiency, obtaining a PCE of 0.13 %, with Jsc of 0.92 mA/cm2, Voc of 0.58 volts, FF of 0.25, Vbi of 0.18 volts, Rs of 20.17 ohms, Rsh of 1.83 × 103 ohms and Na-Nd of 3889.09 × 1025 1/cm3. On the other hand, no difference was found in the efficiency between cells with an area of 4 cm2 and 25 cm2 with respect to the devices built with cells of 1 cm2 interconnected with a total area of the same size. Also, absorbance and transmission spectra, XRD and AFM of thin films are shown. [Display omitted]