Direct Observation of Ultrafast Hole Injection from Lead Halide Perovskite by Differential Transient Transmission Spectroscopy

被引：33

作者：

Ishioka, Kunie ^{[1
]}

Barker, Bobby G., Jr. ^{[2
]}

Yanagida, Masatoshi ^{[3
]}

Shirai, Yasuhiro ^{[3
]}

Miyano, Kenjiro ^{[3
]}

机构：

[1] Natl Inst Mat Sci, Res Ctr Adv Measurement & Characterizat, Sengen 1-2-1, Tsukuba, Ibaraki 3050047, Japan

[2] Univ South Carolina, Dept Chem & Biochem, 631 Sumter St, Columbia, SC 29208 USA

[3] Natl Inst Mat Sci, Global Res Ctr Environm & Energy Based Nanomat Sc, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2017年 / 8卷 / 16期

关键词：

SOLAR-CELLS; CHARGE-TRANSFER; CARRIER TRANSPORT; THIN-FILMS; DYNAMICS; DIFFUSION; RECOMBINATION; ELECTRON; MECHANISM; LENGTHS;

D O I：

10.1021/acs.jpclett.7b01663

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：

Efficient charge separation at the interfaces of the perovskite with the carrier transport layers is crucial for perovskite solar cells to achieve high power conversion efficiency. We present a systematic experimental study on the hole injection dynamics from MAPbI(3) perovskite to three typical hole transport materials (HTMs). We extract the carrier dynamics directly related to the hole injection by employing a pump light with short absorption depth and comparing the transient transmission signals excited on the two sides of the sample. The differential transmission signals reveal the hole injections to PTAA and PEDOT:PSS to be complete within 1 and 2 ps, respectively, and that to NiOx to exhibit an additional slow process on a 40 ps time scale. The obtained injection dynamics are discussed in comparison with the device performance of the solar cells containing the same MAPbI(3)/HTM interfaces.

引用

页码：3902 / 3907

页数：6

共 39 条

[11] Spatial and temporal imaging of long-range charge transport in perovskite thin films by ultrafast microscopy [J].