Polar rotor scattering as atomic-level origin of low mobility and thermal conductivity of perovskite CH3NH3PbI3

doi:10.1038/ncomms16086

	Polar rotor scattering as atomic-level origin of low mobility and thermal conductivity of perovskite CH3NH3PbI3
	Li, Bing 2; Kawakita, Yukinobu 2; Liu, Yucheng 1; Wang, Mingchao 3; Matsuura, Masato 4; Shibata, Kaoru 2; Ohira-Kawamura, Seiko 2; Yamada, Takeshi 4; Lin, Shangchao 3; Nakajima, Kenji 2
刊名	NATURE COMMUNICATIONS
	2017-06-30
卷号	8
DOI	10.1038/ncomms16086
英文摘要	Perovskite CH3NH3PbI3 exhibits outstanding photovoltaic performances, but the understanding of the atomic motions remains inadequate even though they take a fundamental role in transport properties. Here, we present a complete atomic dynamic picture consisting of molecular jumping rotational modes and phonons, which is established by carrying out high-resolution time-of-flight quasi-elastic and inelastic neutron scattering measurements in a wide energy window ranging from 0.0036 to 54 meV on a large single crystal sample, respectively. The ultrafast orientational disorder of molecular dipoles, activated at similar to 165 K, acts as an additional scattering source for optical phonons as well as for charge carriers. It is revealed that acoustic phonons dominate the thermal transport, rather than optical phonons due to sub-picosecond lifetimes. These microscopic insights provide a solid standing point, on which perovskite solar cells can be understood more accurately and their performances are perhaps further optimized.
语种	英语
WOS记录号	WOS:000404455400001
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/152113]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Shaanxi Normal Univ, Natl Minist Educ, Inst Adv Energy Mat, Sch Mat Sci & Engn,Key Lab Appl Surface & Colloid, Xian 710119, Peoples R China 2.Japan Atom Energy Agcy, Japan Proton Accelerator Res Complex, Neutron Sci Sect, Tokai, Ibaraki 3191195, Japan 3.Florida State Univ, FAMU FSU Coll Engn, Mat Sci & Engn Program, Dept Mech Engn, Tallahassee, FL 32310 USA 4.Comprehens Res Org Sci & Soc, Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan 5.Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Li, Bing,Kawakita, Yukinobu,Liu, Yucheng,et al. Polar rotor scattering as atomic-level origin of low mobility and thermal conductivity of perovskite CH3NH3PbI3[J]. NATURE COMMUNICATIONS,2017,8.
APA	Li, Bing.,Kawakita, Yukinobu.,Liu, Yucheng.,Wang, Mingchao.,Matsuura, Masato.,...&Liu, Shengzhong .(2017).Polar rotor scattering as atomic-level origin of low mobility and thermal conductivity of perovskite CH3NH3PbI3.NATURE COMMUNICATIONS,8.
MLA	Li, Bing,et al."Polar rotor scattering as atomic-level origin of low mobility and thermal conductivity of perovskite CH3NH3PbI3".NATURE COMMUNICATIONS 8(2017).