A fluorene-terminated hole-transporting material for highly efficient and stable perovskite solar cells

被引：1960

作者：

Jeon, Nam Joong ^{[1
]}

Na, Hyejin ^{[1
]}

Jung, Eui Hyuk ^{[1
]}

Yang, Tae-Youl ^{[1
]}

Lee, Yong Guk ^{[1
]}

Kim, Geunjin ^{[1
]}

Shin, Hee-Won ^{[2
]}

Seok, Sang Il ^{[1
,3
]}

Lee, Jaemin ^{[1
]}

Seo, Jangwon ^{[1
]}

机构：

[1] KRICT, Div Adv Mat, Daejeon, South Korea

[2] Sungkyunkwan Univ, Dept Energy Sci, Suwon, South Korea

[3] Ulsan Natl Inst Sci & Technol, Sch Energy & Chem Engn, Ulsan, South Korea

来源：

NATURE ENERGY | 2018年 / 3卷 / 08期

基金：

新加坡国家研究基金会;

关键词：

HALIDE PEROVSKITES; THERMAL-STABILITY; LOW-COST; LENGTHS; LAYERS;

D O I：

10.1038/s41560-018-0200-6

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Perovskite solar cells (PSCs) require both high efficiency and good long-term stability if they are to be commercialized. It is crucial to finely optimize the energy level matching between the perovskites and hole-transporting materials to achieve better performance. Here, we synthesize a fluorene-terminated hole-transporting material with a fine-tuned energy level and a high glass transition temperature to ensure highly efficient and thermally stable PSCs. We use this material to fabricate photovoltaic devices with 23.2% efficiency (under reverse scanning) with a steady-state efficiency of 22.85% for small-area (-0.094 cm(2)) cells and 21.7% efficiency (under reverse scanning) for large-area (-1 cm(2)) cells. We also achieve certified efficiencies of 22.6% (small-area cells, -0.094 cm(2)) and 20.9% (large-area, -1 cm(2)). The resultant device shows better thermal stability than the device with spiro-OMeTAD, maintaining almost 95% of its initial performance for more than 500 h after thermal annealing at 60 degrees C.

引用

页码：682 / +

页数：10

共 35 条

[1]

[Anonymous], 2016, BEST RES CELL EFF

[2] High Open-Circuit Voltage: Fabrication of Formamidinium Lead Bromide Perovskite Solar Cells Using Fluorene-Dithiophene Derivatives as Hole-Transporting Materials [J].