Title Fluorene-based enamines as low-cost and dopant-free hole transporting materials for high performance and stable perovskite solar cells /
Authors Daskeviciute, Sarune ; Momblona, Cristina ; Rakstys, Kasparas ; Sutanto, Albertus Adrian ; Daskeviciene, Marytė ; Jankauskas, Vygintas ; Gruodis, Alytis ; Bubniene, Giedre ; Getautis, Vytautas ; Nazeeruddin, Mohammad Khaja
DOI 10.1039/D0TA08452B
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Is Part of Journal of materials chemistry A.. Cambridge : Royal society of chemistry. 2021, vol. 9, iss. 1, p. 301-309.. ISSN 2050-7488. eISSN 2050-7496
Keywords [eng] fluorene-based enamines ; hole‐transporting materials ; perovskite solar cells
Abstract [eng] The power conversion efficiency of perovskite solar cells is approaching the Shockley-Queisser limit, therefore this technology is next to the commercialization stage. The inexpensive and stable hole transporting materials are highly desirable towards the successful scale-up. Most high performing devices generally employ expensive hole conductors that are synthesized via cross-coupling reactions that require expensive catalysts, inert reaction conditions and time-consuming sophisticated product purification. In a quest to employ cost-effective chemistry to combine the building blocks, we explore enamine-based small molecules that can be synthesized in a simple condensation reaction from commercially available materials leading to an estimated material cost of few euros per gram. Synthesized fluorene-based enamines exhibit very high hole mobility up to 3.3×10-4 cm2/Vs and enables the fabrication of perovskite solar cells with a maximum power conversion efficiency of 19.3% in doped configuration and 17.1% without doping. In addition, both PSCs systems demonstrate superior long-term stability compared to spiro-OMeTAD. This work shows that hole transporting materials prepared via simple condensation protocol have the potential to compete in performance with materials obtained via expensive cross-coupling methods at a fraction of their cost and deliver exceptional stability of the final device. This work provides a design strategy for the further development of novel, low-cost semiconductors.
Published Cambridge : Royal society of chemistry
Type Journal article
Language English
Publication date 2021