Two-step thermal annealing improves the morphology of spin-coated films for highly efficient perovskite hybrid photovoltaics

被引：105

作者：

Hsu, Hsiang-Lin ^{[1
]}

Chen, Chih-Ping ^{[1
,2
]}

Chang, Jia-Yaw ^{[3
]}

Yu, Yang-Yen ^{[1
,2
]}

Shen, Yu-Kai ^{[1
]}

机构：

[1] Ming Chi Univ Technol, Dept Mat Engn, New Taipei City 243, Taiwan

[2] Ming Chi Univ Technol, Battery Res Ctr Green Energy, New Taipei City 243, Taiwan

[3] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 10607, Taiwan

来源：

NANOSCALE | 2014年 / 6卷 / 17期

关键词：

HETEROJUNCTION SOLAR-CELLS; OPEN-CIRCUIT VOLTAGE; LOW-TEMPERATURE; PERFORMANCE; TRIHALIDE; TRANSPORT; LENGTHS;

D O I：

10.1039/c4nr02751e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, we describe relationships between the morphologies and the power conversion efficiencies (PCE) of perovskite photovoltaics having a conventional p-i-n heterojunction structure, indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene): polystyrenesulfonate (PEDOT:PSS)/CH3NH3PbI3-xClx/PC61BM/Al. The PCE of such a device is highly dependent on the morphology of the perovskite film, which is governed by the concentrations of its precursors and the annealing conditions. A two-step annealing process allowed sufficient crystallization of the perovskite material, with a high coverage at a high precursor concentration. Relative to the device prepared using a one-step process (90 degrees C for 30 min), we observed a 60% increase in PCE for this optimized device. The corresponding devices exhibited extremely high stability after long-term storage (> 1368 h) in the dark in a N-2-filled glove box, with consistently high PCEs (AM 1.5G, 100 mW cm(-2)) of up to 9.1%.

引用

页码：10281 / 10288

页数：8

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