A facile strategy for high performance air-processed perovskite solar cells with dopant-free poly(3-hexylthiophene) hole transporter

A comparative study of different poly(3-hexylthiophene)–carbon based hole transport layers on the stability of perovskite solar cells prepared under ambient conditions

“…It is important to mention that the efficiencies of PSCs reported in this work are considerably lower than those reported elsewhere (Nia et al, 2017;Nia et al, 2018, Nia et al, 2021, Nia et al, 2019Wu et al, 2022). The reasons could be: (1) the lower molecular weight (MW) of our P3HT products (28 kDa), (2) the simple perovskite compound used in this work (MAPbI3-xClx), and (3) no interfacial modification during our PSC preparation.…”

“…In our PSCs, the thickness of the m-TiO 2 layers was about 220 nm, however, the average efficiencies of our pristine P3HT-based PSCs, 9.40%, are much higher than those reported in Nia et al, (2017) with a similar thickness of m-TiO 2 (250 nm) and MW of P3HT (44 kDa), 4.92%. On the other hand, in the case of Wu et al, (2022), the FAI treatment on the MAPbI 3−x Cl x surface helps to improve the efficiencies of the PSCs. Although the results of those papers suggest that the low efficiencies of our PSCs could be significantly improved if higher MW of P3HT and modified perovskite were used, none of those papers have reported on the stability of non-encapsulated cells under continuous illumination.…”

4-Iodo-1H-imidazole dramatically improves the open-circuit voltages of perovskite solar cells to 1.2 V

“…The τ 2 value of the target film (326.31 ns) is larger than that of the control film (104.91 ns), demonstrating that the additive increases the radiation recombination of perovskite films. 51 This is conducive to improving the V OC of PSCs.…”

Recent Advances in Poly(3‐hexylthiophene) and Its Applications in Perovskite Solar Cells

“…[ 129 ] Wu et al reported a modified perovskite/P3HT interface where a formamidinium iodide (FAI) solution is spin‐coated onto MAPbI 3 's intermediate phase. [ 130 ] The gradient distribution of formamidinium cations resulted in the formation of gradient mixed‐cation perovskite with larger grain size, enhanced crystallinity, and absorption efficiency. The new surface had lower defects and more suppressed charge recombination sites and facilitated charge transport achieving a high 16.26% PCE with improved stability.…”

“…The new surface had lower defects and more suppressed charge recombination sites and facilitated charge transport achieving a high 16.26% PCE with improved stability. [ 130 ] Adjusting the perovskite deposition temperatures to regulate the surface topography is another way to enhance the perovskite/P3HT interface interactions. [ 118 ] The resulting smoother surface morphology led to better physical contact with P3HT and boosted hole extraction, leading to a maximum PCE of 15%, attained for the perovskite deposited at low temperature (10 °C).…”