Boosting Perovskite Solar Cells Performance and Stability through Doping a Poly‐3(hexylthiophene) Hole Transporting Material with Organic Functionalized Carbon Nanostructures |
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| Authors: | Teresa Gatti Simone Casaluci Mirko Prato Marco Salerno Francesco Di Stasio Alberto Ansaldo Enzo Menna Aldo Di Carlo Francesco Bonaccorso |
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| Affiliation: | 1. Department of Chemical Sciences, University of Padova, Padova, Italy;2. Department of Electronic Engineering, University of Roma “Tor Vergata”, Center for Hybrid and Organic Solar Energy (CHOSE), Rome, Italy;3. Nanochemistry Department, Istituto Italiano di Tecnologia, Genova, Italy;4. NanoPhysics Department, Istituto Italiano di Tecnologia, Genova, Italy;5. Graphene Labs, Istituto Italiano di Tecnologia, Genova, Italy |
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| Abstract: | Perovskite solar cells (PSCs) are demonstrating great potential to compete with second generation photovoltaics. Nevertheless, the key issue hindering PSCs full exploitation relies on their stability. Among the strategies devised to overcome this problem, the use of carbon nanostructures (CNSs) as hole transporting materials (HTMs) has given impressive results in terms of solar cells stability to moisture, air oxygen, and heat. Here, the use of a HTM based on a poly(3‐hexylthiophene) (P3HT) matrix doped with organic functionalized single walled carbon nanotubes (SWCNTs) and reduced graphene oxide in PSCs is proposed to achieve higher power conversion efficiencies (η = 11% and 7.3%, respectively) and prolonged shelf‐life stabilities (480 h) in comparison with a benchmark PSC fabricated with a bare P3HT HTM (η = 4.3% at 480 h). Further endurance test, i.e., up to 3240 h, has shown the failure of all the PSCs based on undoped P3HT, while, on the contrary, a η of ≈8.7% is still detected from devices containing 2 wt% SWCNT‐doped P3HT as HTM. The increase in photovoltaic performances and stabilities of the P3HT‐CNS‐based solar cell, with respect to the standard P3HT‐based one, is attributed to the improved interfacial contacts between the doped HTM and the adjacent layers. |
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| Keywords: | carbon nanotubes graphene based materials hole transporting materials perovskite solar cells solar cells stabilities |
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