Fluorinated fullerene interlayers for tin halide perovskite solar cells with enhanced operational air stability and minimized voltage losses

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F25%3A39923467" target="_blank" >RIV/00216275:25310/25:39923467 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1039/d5el00071h" target="_blank" >https://doi.org/10.1039/d5el00071h</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d5el00071h" target="_blank" >10.1039/d5el00071h</a>

Result language

angličtina

Original language name

Fluorinated fullerene interlayers for tin halide perovskite solar cells with enhanced operational air stability and minimized voltage losses

Original language description

Tin halide perovskite solar cells (Sn-PSCs) are a promising alternative to their lead-based analogues due to their favorable optoelectronic properties. However, their performance is still limited by two main factors: on one hand, the tendency of Sn2+ to oxidize to Sn4+, which leads to high non-radiative recombination; and on the other hand, the offset between the perovskite conduction band and the LUMO level of the standard C60 fullerene, which hinders efficient charge transport and limits overall device performance. While the former has received significant attention, the latter has been less explored, despite being a major bottleneck for Sn-PSC development. In this work, we designed and synthesized two novel fullerene derivatives, namely JM10 and JM12, functionalized with different fluorine-rich moieties and incorporated them as interlayers between the perovskite and the C60 electron transport layer (ETL). These derivatives demonstrated suitable LUMO levels and effectively alleviated the energy level misalignment at the perovskite/ETL interface, minimizing the undesirable charge recombination and enhancing the charge extraction processes. As a result, the best-performing Sn-PSCs incorporating JM12 showed a nearly 20% increase in power conversion efficiency with respect to the reference devices. Moreover, the fluorinated groups increased the hydrophobicity of the interlayers, significantly improving the operational stability of the unencapsulated devices under harsh ambient conditions (60% RH and 25 °C). As a result, devices containing JM10 and JM12 retained up to 80% of their initial performance after more than 15 and 18 hours, respectively. These results highlight the potential of fullerene chemistry&apos;s versatility to mitigate carrier losses at the interfaces while simultaneously improving both the performance and stability of Sn-PSCs, paving the way for future advancements in their design and development.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

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Continuities

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Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

EES Solar

ISSN

3033-4063

e-ISSN

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Volume of the periodical

1

Issue of the periodical within the volume

June

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

608-619

UT code for WoS article

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EID of the result in the Scopus database

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