Efficiency Exceeding 20% in Perovskite Solar Cells with Side-Chain Liquid Crystalline Polymer-Doped Perovskite Absorbers

被引：54

作者：

Arivunithi, Veera Murugan ^{[1
]}

Reddy, Saripally Sudhaker ^{[1
]}

Sree, Vijaya Gopalan ^{[1
]}

Park, Ho-Yeol ^{[1
]}

Park, Juuyn ^{[2
]}

Kang, Yong-Cheol ^{[2
]}

Shin, Eun-Sol ^{[3
]}

Noh, Yong-Young ^{[3
]}

Song, Myungkwan ^{[4
]}

Jin, Sung-Ho ^{[1
]}

机构：

[1] Pusan Natl Univ, Dept Chem Educ, Grad Dept Chem Mat, Inst Plast Informat & Energy Mat, Busandaehakro 63-2, Busan 46241, South Korea

[2] Pukyong Natl Univ, Dept Chem, 45 Yongso Ro, Busan 48513, South Korea

[3] Dongguk Univ, Dept Energy & Mat Engn, 26 Pil Dong,3 Ga, Seoul 100715, South Korea

[4] KIMS, Adv Funct Thin Films Dept, Surface Technol Div, 797 Changwondaero, Chang Won 51508, Gyeongnam, South Korea

来源：

ADVANCED ENERGY MATERIALS | 2018年 / 8卷 / 30期

基金：

新加坡国家研究基金会;

关键词：

high efficiency; passivation; perovskite solar cells; side-chain liquid crystalline polymers; stability; PLANAR PEROVSKITE; HALIDE PEROVSKITES; GRAIN-BOUNDARIES; HIGH-PERFORMANCE; PASSIVATION; LENGTHS; FILMS;

D O I：

10.1002/aenm.201801637

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Attaining high quality perovskite films with enhanced morphology, high efficiency, and better stability is a great research challenge. Here, a side-chain liquid crystalline polymer (SCLCP) is incorporated as a dopant into the perovskite film to achieve perovskite solar cells (PSCs) with high efficiency and long-term stability. SCLCP doping increases the grain size in the crystalline perovskite film by controlled solvent evaporation and reduced grain boundaries, which slow the material degradation and reduce the charge recombination. Using this approach, the PSC power conversion efficiency (PCE) is significantly boosted from 18.0% (nondoped) to 20.63% for the SCLCP-doped perovskite film with much improved air stability. Furthermore, the trap state density in the SCLCP-doped films is decreased because the SCLCP effectively passivates the perovskite grain surface. Notably, the SCLCP appears to act as a bridge between grains for effective charge transfer from perovskite toward the electrode, which would partially explain the enhanced efficiency and stability.

引用

页数：8

共 47 条

[1] Simultaneous Improvement of Photovoltaic Performance and Stability by In Situ Formation of 2D Perovskite at (FAPbI3)0.88(CsPbBr3)0.12/CuSCN Interface [J].