title: Poly(3-hexylthiophene-2,5-diyl) as a Hole Transport Layer for Colloidal Quantum Dot Solar Cells.
abstract: Lead sulfide colloidal quantum dot (CQD) solar cells demonstrate extremely high short-circuit currents (Jsc) and are making decent progress in power conversion efficiencies. However, the low fill factors (FF) and open-circuit voltages have to be addressed with urgency to prevent the stalling of efficiency improvements. This paper highlights the importance of improving hole extraction, which received much less attention as compared to the electron-accepting component of the device architecture (e.g., TiO2 or ZnO). Here, we show the use of semiconducting polymer poly(3-hexylthiophene-2,5-diyl) to create efficient CQD devices by improving hole transport, removing interfacial barriers, and minimizing shunt pathways, thus resulting in an overall improvement in device performance stemming from better Jsc and FF.
authors.affiliation: Materials Department, University of Oxford , 16 Parks Road, OX1 3PH Oxford, United Kingdom.
authors.forename: Darren C J
authors.initials: DC
authors.lastname: Neo
authors.affiliation: Materials Department, University of Oxford , 16 Parks Road, OX1 3PH Oxford, United Kingdom.
authors.forename: Nanlin
authors.initials: N
authors.lastname: Zhang
authors.affiliation: Materials Department, University of Oxford , 16 Parks Road, OX1 3PH Oxford, United Kingdom.
authors.forename: Yujiro
authors.initials: Y
authors.lastname: Tazawa
authors.affiliation: Materials Department, University of Oxford , 16 Parks Road, OX1 3PH Oxford, United Kingdom.|Centre for Microscopy, Characterisation and Analysis, The University of Western Australia , 35 Stirling Highway, Crawley 6009, Western Australia Australia.
authors.forename: Haibo
authors.initials: H
authors.lastname: Jiang
authors.affiliation: Materials Department, University of Oxford , 16 Parks Road, OX1 3PH Oxford, United Kingdom.
authors.forename: Gareth M
authors.initials: GM
authors.lastname: Hughes
authors.affiliation: Materials Department, University of Oxford , 16 Parks Road, OX1 3PH Oxford, United Kingdom.
authors.forename: Chris R M
authors.initials: CR
authors.lastname: Grovenor
authors.affiliation: Materials Department, University of Oxford , 16 Parks Road, OX1 3PH Oxford, United Kingdom.
authors.forename: Hazel E
authors.initials: HE
authors.lastname: Assender
authors.affiliation: Materials Department, University of Oxford , 16 Parks Road, OX1 3PH Oxford, United Kingdom.
authors.forename: Andrew A R
authors.initials: AA
authors.lastname: Watt
keywords: P3HT; colloidal quantum dots; hole transport layer; lead sulfide; solar cell