Efficient Inverted Perovskite Solar Cells Enabled by Dopant-Free Hole-Transporting Materials Based on Dibenzofulvene-Bridged Indacenodithiophene Core Attaching Varying Alkyl Chains

Zhu，Enwei1; Wang，Jiantao2,3; Xu，Jing2; Fu，Liying1; Li，Ruxue4; Yu，Chengzhuo2; Ge，Shijie2; Lin，Xiaosong2; Chen，Rui4; Wu，Hongkai3; Wang，Hsing Lin2; Che，Guangbo1

2021

10.1021/acsami.0c22993

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

1944-8252

Inspired by the structural advantages of spiro-OMeTAD, which is the most commonly used hole-transporting material (HTM), two rationally designed HTMs with butterfly-shaped triarylamine groups based on dibenzofulvene-bridged indacenodithiophene (IDT) core (attaching hexyl and octyl chains) have been synthesized, namely, IT-C6 and IT-C8, respectively. Shorter alkyl-chain-based IT-C6 exhibits a marked increase in glass-transition temperature (Tg) of 105 °C, whereas IT-C8 shows a Tg of 95 °C. Moreover, it is demonstrated that IT-C6 exhibits a higher hole-transporting mobility, more suitable band energy alignment, better interfacial contact, and passivation effect. The inverted devices of employed HTM based on IT-C6 obtained a champion PCE of 18.34% with a remarkable fill factor (FF) of 82.32%, whereas the IT-C8-based device delivered an inferior PCE of 16.94% with an FF up to 81.20%. Both HTMs embodied inverted devices present high FF values greater than 81%, which are among the highest reported values of small molecular HTM-based PSCs. This work reveals that cutting off the symmetrical spiro-core and subsequently combining IDT (attaching tailored alkyl chains) with the spiro-linkage fluorine to construct the orthogonal molecular conformation is a significant principle for the design of promising dopant-free HTMs.

dibenzofulvene-bridged indacenodithiophene core dopant-free fill factor hole-transporting materials perovskite solar cells

SCI ; EI

英语

通讯

National Key Research and Development Program of China[2018YFB0704100] ; Leading Talents of Guangdong Province Program[2016LJ06N507] ; Research and Development Program of Guangdong Province for Key Areas[2019B010941001] ; Shenzhen Basic Research Fund[CYJ20170817110652558] ; Natural Science Foundation Project of Jilin Province["20180101181JC","20180623042TC"] ; Project of Human Resources and Social Security Department of Jilin Province[2017956] ; Project of Jilin Province Development and Reform Commission[2019C044]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000634759500061

AMER CHEMICAL SOC

20211410176543

Glass transition ; Hole mobility ; Perovskite

Minerals:482.2 ; Semiconducting Materials:712.1 ; Chemical Operations:802.3

2-s2.0-85103506652

Scopus

1.Key Laboratory of Preparation and Application of Environmental-Friendly Materials,Jilin Normal University,Ministry of Education,Changchun,130103,China
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,1088 Xueyuan Avenue,518055,China
3.Department of Chemistry,Hong Kong University of Science and Technology,Clear Water Bay Road,Hong Kong
4.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,1088 Xueyuan Avenue,518055,China

Zhu，Enwei,Wang，Jiantao,Xu，Jing,et al. Efficient Inverted Perovskite Solar Cells Enabled by Dopant-Free Hole-Transporting Materials Based on Dibenzofulvene-Bridged Indacenodithiophene Core Attaching Varying Alkyl Chains[J]. ACS Applied Materials & Interfaces,2021,13(11):13254-13263.

Zhu，Enwei.,Wang，Jiantao.,Xu，Jing.,Fu，Liying.,Li，Ruxue.,...&Che，Guangbo.(2021).Efficient Inverted Perovskite Solar Cells Enabled by Dopant-Free Hole-Transporting Materials Based on Dibenzofulvene-Bridged Indacenodithiophene Core Attaching Varying Alkyl Chains.ACS Applied Materials & Interfaces,13(11),13254-13263.

Zhu，Enwei,et al."Efficient Inverted Perovskite Solar Cells Enabled by Dopant-Free Hole-Transporting Materials Based on Dibenzofulvene-Bridged Indacenodithiophene Core Attaching Varying Alkyl Chains".ACS Applied Materials & Interfaces 13.11(2021):13254-13263.