A swivel-cruciform thiophene based hole-transporting material for efficient perovskite solar cells

Thirumal Krishnamoorthy; Fu Kunwu; Pablo P. Boix; Hairong Li; Teck Ming Koh; Wei Lin Leong; Satvasheel Powar; Andrew Grimsdale; Michael Grätzel; Nripan Mathews; Subodh G. Mhaisalkar

doi:10.1039/C4TA00486H

A swivel-cruciform thiophene based hole-transporting material for efficient perovskite solar cells†

Thirumal Krishnamoorthy,^a Fu Kunwu,^a Pablo P. Boix,^a Hairong Li,^a Teck Ming Koh,^ab Wei Lin Leong,^c Satvasheel Powar,^a Andrew Grimsdale,^b Michael Grätzel,^d Nripan Mathews*^abe and Subodh G. Mhaisalkar*^ab

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* Corresponding authors

^a Energy Research Institute @ NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore
E-mail: Nripan@ntu.edu.sg, Subodh@ntu.edu.sg

^b School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, Singapore

^c Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602

^d Laboratory of Photonics and Interfaces, EPFL, Lausanne, Switzerland

^e Singapore-Berkeley Research Initiative for Sustainable Energy, 1 Create Way, Singapore 138602, Singapore

Abstract

A novel swivel-cruciform 3,3′-bithiophene based hole-transporting material (HTM) with a low lying highest occupied molecular orbital (HOMO) level was synthesized. This new HTM (KTM3) in CH₃NH₃PbI₃ perovskite solar cells showed a higher V_oc (1.08 V) and fill factor (78.3%) compared to solar cells fabricated using the widely used spiro-OMeTAD.

Journal of Materials Chemistry A

A swivel-cruciform thiophene based hole-transporting material for efficient perovskite solar cells†

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A swivel-cruciform thiophene based hole-transporting material for efficient perovskite solar cells

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