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Polar rotor scattering as atomic-level origin of low mobility and thermal conductivity of perovskite CH3NH3PbI3
Li, Bing1; Kawakita, Yukinobu1; Liu, Yucheng2; Wang, Mingchao3; Matsuura, Masato4; Shibata, Kaoru1; Ohira-Kawamura, Seiko1; Yamada, Takeshi4; Lin, Shangchao3; Nakajima, Kenji1; Liu, Shengzhong (Frank)2,5
刊名NATURE COMMUNICATIONS
2017-06-30
DOI10.1038/ncomms16086
8
收录类别SCI
文章类型Article
WOS标题词Science & Technology
类目[WOS]Multidisciplinary Sciences
研究领域[WOS]Science & Technology - Other Topics
关键词[WOS]INORGANIC HYBRID PEROVSKITES ; METHYLAMMONIUM LEAD HALIDE ; HOT-PHONON BOTTLENECK ; TRANSPORT-PROPERTIES ; IODIDE PEROVSKITES ; PHASE-TRANSITIONS ; HIGH-PERFORMANCE ; SINGLE-CRYSTALS ; ORGANIC CATIONS ; SOLAR-CELLS
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
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/152113
专题中国科学院大连化学物理研究所
作者单位1.Japan Atom Energy Agcy, Japan Proton Accelerator Res Complex, Neutron Sci Sect, Tokai, Ibaraki 3191195, Japan
2.Shaanxi Normal Univ, Natl Minist Educ, Inst Adv Energy Mat, Sch Mat Sci & Engn,Key Lab Appl Surface & Colloid, Xian 710119, Peoples R China
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
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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).
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