K
Kasparas Rakstys
Researcher at Kaunas University of Technology
Publications - 48
Citations - 2323
Kasparas Rakstys is an academic researcher from Kaunas University of Technology. The author has contributed to research in topics: Perovskite (structure) & Chemistry. The author has an hindex of 19, co-authored 39 publications receiving 1763 citations. Previous affiliations of Kasparas Rakstys include École Polytechnique Fédérale de Lausanne & University of Queensland.
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Journal ArticleDOI
Triazatruxene-Based Hole Transporting Materials for Highly Efficient Perovskite Solar Cells
Kasparas Rakstys,Antonio Abate,M. Ibrahim Dar,Peng Gao,Vygintas Jankauskas,Gwénolé Jacopin,Egidijus Kamarauskas,Samrana Kazim,Shahzada Ahmad,Michael Grätzel,Mohammad Khaja Nazeeruddin +10 more
TL;DR: Triazatruxene-based compounds are demonstrated as a new class of HTM for the fabrication of highly efficient perovskite solar cells and remarkable power conversion efficiency was achieved using 5,10,15-trihexyl-3,8,13-tris(4-methoxyphenyl)-10, 15-dihydro-5H-diindolo[3,2-a:3',2'-c]carbazole with compos
Journal ArticleDOI
Molecular engineering of face-on oriented dopant-free hole transporting material for perovskite solar cells with 19% PCE
Kasparas Rakstys,Sanghyun Paek,Peng Gao,Paul Gratia,Tomasz Marszalek,Giulia Grancini,Kyung Taek Cho,Kristijonas Genevičius,Vygintas Jankauskas,Wojciech Pisula,Mohammad Khaja Nazeeruddin +10 more
TL;DR: In this paper, a dopant-free star-shaped D-π-hole transporting materials coded KR355, KR321, and KR353 were systematically designed, synthesized and characterized.
Journal ArticleDOI
Dopant-Free Hole-Transporting Materials for Stable and Efficient Perovskite Solar Cells.
Sanghyun Paek,Peng Qin,Yonghui Lee,Kyung Taek Cho,Peng Gao,Giulia Grancini,Emad Oveisi,Paul Gratia,Kasparas Rakstys,Shaheen A. Al-Muhtaseb,Christian Ludwig,Jaejung Ko,Mohammad Khaja Nazeeruddin +12 more
TL;DR: It is found that the maximum power output collected after 1300 h remained 65% of its initial value, which opens up new avenue for efficient and stable PSCs exploring new materials as alternatives to Spiro-OMeTAD.
Journal ArticleDOI
Efficiency vs. stability: dopant-free hole transporting materials towards stabilized perovskite solar cells
TL;DR: Doping of hole transporting materials typically increases the efficiency of perovskite solar cells but remains questionable for overall device stability.
Journal ArticleDOI
Highly Efficient Perovskite Solar Cells Employing an Easily Attainable Bifluorenylidene‐Based Hole‐Transporting Material
Kasparas Rakstys,Michael Saliba,Peng Gao,Paul Gratia,Egidijus Kamarauskas,Sanghyun Paek,Vygintas Jankauskas,Mohammad Khaja Nazeeruddin,Mohammad Khaja Nazeeruddin +8 more
TL;DR: The 4,4'-dimethoxydiphenylamine-substituted 9,9'-bifluorenylidene (KR216) hole transporting material has been synthesized using a straightforward two-step procedure from commercially available and inexpensive starting reagents, mimicking the synthetically challenging spiro-OMeTAD moiety.