Synergistic effects of multiple functional ionic liquid-treated PEDOT:PSS and less-ion-defects S-acetylthiocholine chloride-passivated perovskite surface enabling stable and hysteresis-free inverted perovskite solar cells with conversion efficiency over 20%

Zhou, Xianyong1,2; Hu, Manman1; Liu, Chang1,2; Zhang, Luozheng1,2; Zhong, Xiongwei1; Li, Xiangnan1; Tian, Yanqing1,2; Cheng, Chun1,2; Xu, Baomin A.1,2

2019-09

10.1016/j.nanoen.2019.103866

Nano Energy   影响因子和分区

2211-2855

2211-3282

The surface defects and grain boundary defects of organometallic halide perovskite films are detrimental to both the efficiency and stability of perovskite solar cells (PSCs). Furthermore, the electrical conductivity, work function and surface morphology of the hole transport layer (HTL) can also affect the performance of PSCs significantly. Here, we first have developed a novel synergistic strategy that uses multiple functional EMIC (1-Ethyl-3-methylimidazolium chloride) ionic liquid to modify PEDOT:PSS (poly (3, 4-ethylenedioxythiophene) polystyrene sulfonate) HTL, thereby obtaining the HTL with high electrical conductivity, low work function and smooth surface. Moreover, a novel S-acetylthiocholine chloride molecule which replaces expensive PCBM (phenyl-C-61-butyric acid methyl ester) is developed to effectively passivate the negative- and positive-charged ionic defects in hybrid perovskite. The synergistic strategy extends the carrier recombination lifetime and reduces the charge trap density. In addition, the current hysteresis of the inverted device was also effectively eliminated. As a result, the champion cell in small area shows 20.06% efficiency with no hysteresis, along with an efficiency 18.77% for inverted PSCs in an active area of 1 cm(2), both of which are the highest efficiency in the one-step PEDOT:PSS-based inverted PSCs so far. Compared to PCBM, the device passivated by S-acetylthiocholine chloride also has improved environmental stability (retaining 85% of initial PCE after 35 days storage without encapsulation in air with 60% humidity) and thermal stability (retaining 87% of initial PCE after 80 degrees C for 24 h storage without encapsulation under inert atmosphere).

Perovskite solar cells PEDOT:PSS Ionic liquid Synergistic effects Ion passivation

SCI ; EI

英语

第一 ; 通讯

Fundamental Research (Discipline Arrangement) project of Shenzhen Science and Technology Innovation Committee[JCYJ20170412154554048]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000480422400046

ELSEVIER

20192807162967

Butyric acid ; Chlorine compounds ; Conducting polymers ; Efficiency ; Electric conductivity ; Grain boundaries ; Hysteresis ; Ionic liquids ; Morphology ; Organometallics ; Passivation ; Perovskite ; Surface defects ; Surface morphology ; Work function

Minerals:482.2 ; Protection Methods:539.2.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Conducting Materials:708.2 ; Chemical Products Generally:804 ; Organic Compounds:804.1 ; Production Engineering:913.1 ; Atomic and Molecular Physics:931.3 ; Materials Science:951 ; Systems Science:961

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Engn Res & Dev Ctr Flexible Solar Cells, Shenzhen 518055, Guangdong, Peoples R China

Zhou, Xianyong,Hu, Manman,Liu, Chang,et al. Synergistic effects of multiple functional ionic liquid-treated PEDOT:PSS and less-ion-defects S-acetylthiocholine chloride-passivated perovskite surface enabling stable and hysteresis-free inverted perovskite solar cells with conversion efficiency over 20%[J]. Nano Energy,2019,63.

Zhou, Xianyong.,Hu, Manman.,Liu, Chang.,Zhang, Luozheng.,Zhong, Xiongwei.,...&Xu, Baomin A..(2019).Synergistic effects of multiple functional ionic liquid-treated PEDOT:PSS and less-ion-defects S-acetylthiocholine chloride-passivated perovskite surface enabling stable and hysteresis-free inverted perovskite solar cells with conversion efficiency over 20%.Nano Energy,63.

Zhou, Xianyong,et al."Synergistic effects of multiple functional ionic liquid-treated PEDOT:PSS and less-ion-defects S-acetylthiocholine chloride-passivated perovskite surface enabling stable and hysteresis-free inverted perovskite solar cells with conversion efficiency over 20%".Nano Energy 63(2019).