Efficient Perovskite Solar Cells with a Novel Aggregation-Induced Emission Molecule as Hole-Transport Material

Cao, Yulin1,2; Chen, Wei2,3; Sun, Huiliang2; Wang, Dong4; Chen, Peng2; Djurisic, Aleksandra B.3; Zhu, Yudong2; Tu, Bao2; Guo, Xugang2; Tang, Ben-Zhong4; He, Zhubing2

2019-07-23

10.1002/solr.201900189

Solar RRL   影响因子和分区

2367-198X

Organic hole-transport materials (HTMs) are very promising for perovskite solar cells (PSCs) because the molecule structure is engineered via facile chemical routes. Herein, an aggregation-induced emission (AIE) molecule, 2-(2,7-bis(4-(bis(4-methoxyphenyl)amino)phenyl)-9H-fluoren-9-ylidene)malononitrile (TFM), is successfully employed for the first time as a HTM in an inverted planar PSC, obtaining a promising device performance superior to that of the control device with poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) HTM. An optimal power conversion efficiency (PCE) of 16.03% is obtained for the TFM-based PSCs with a J(sc) of 22.68 mA cm(-2), V-oc of 0.97 V and FF of 72.9%, while that of the control PEDOT:PSS-based device is 14.95%. Steady-state and time-resolved photoluminescence results reveal suppressed nonradiative recombination at the TFM/perovskite interface that is attributed to the effective passivation of the uncoordinated Pb at the perovskite surface by the CN- groups of TFM molecules, as confirmed by X-ray photoelectronic spectroscopy measurements. In addition to the passivation, the hydrophobic character of TFM films also contributes to the improved device stability. The findings demonstrate the potential of AIE molecules in PSCs and also paves a novel way to improve device performance and stability by molecular structure engineering of AIE molecules in the future.

aggregation-induced emission hole transport materials inverted structure perovskite solar cells

SCI ; EI

英语

通讯

Youth Innovation Foundation of Shenzhen Polytechnic[601722K35019]

Energy & Fuels ; Materials Science

Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000477154100001

WILEY-V C H VERLAG GMBH

20200608149495

Passivation ; Perovskite ; Hole mobility ; Conducting polymers ; Transportation routes ; Perovskite solar cells ; Interface states

Minerals:482.2 ; Protection Methods:539.2.1 ; Solar Cells:702.3 ; Conducting Materials:708.2 ; Semiconducting Materials:712.1 ; Polymeric Materials:815.1 ; Classical Physics; Quantum Theory; Relativity:931 ; Atomic and Molecular Physics:931.3 ; High Energy Physics; Nuclear Physics; Plasma Physics:932

Web of Science

1.Shenzhen Polytech, Ind Training Ctr, Phys Lab, 4089 Shahe West Rd, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Key Lab Full Spectral Solar Elect Genera, Dept Mat Sci & Engn, 1088 Xueyuan Rd, Shenzhen 518055, Guangdong, Peoples R China
3.Univ Hong Kong, Dept Phys, Pokfulam, Hong Kong, Peoples R China
4.Shenzhen Univ, Coll Mat Sci & Engn, Ctr AIE Res, 1066 Xueyuan Rd, Shenzhen 518055, Guangdong, Peoples R China

Cao, Yulin,Chen, Wei,Sun, Huiliang,et al. Efficient Perovskite Solar Cells with a Novel Aggregation-Induced Emission Molecule as Hole-Transport Material[J]. Solar RRL,2019,4(2).

Cao, Yulin.,Chen, Wei.,Sun, Huiliang.,Wang, Dong.,Chen, Peng.,...&He, Zhubing.(2019).Efficient Perovskite Solar Cells with a Novel Aggregation-Induced Emission Molecule as Hole-Transport Material.Solar RRL,4(2).

Cao, Yulin,et al."Efficient Perovskite Solar Cells with a Novel Aggregation-Induced Emission Molecule as Hole-Transport Material".Solar RRL 4.2(2019).