Journal ArticleDOI
Highly spin-polarized carrier dynamics and ultralarge photoinduced magnetization in CH3NH3PbI3 perovskite thin films.
David Giovanni,Hong Ma,Hong Ma,Julianto Chua,Michael Grätzel,Michael Grätzel,Ramamoorthy Ramesh,Subodh Mhaisalkar,Nripan Mathews,Tze Chien Sum +9 more
Reads0
Chats0
TLDR
This work highlights the potential of CH3NH3PbI3 as a new candidate for ultrafast spin switches in spintronics applications and elucidates the electron spin relaxation lifetime to be ∼7 ps and that of the hole is ∼1 ps through a simple two-level model.Abstract:
Low-temperature solution-processed organic-inorganic halide perovskite CH3NH3PbI3 has demonstrated great potential for photovoltaics and light-emitting devices. Recent discoveries of long ambipolar carrier diffusion lengths and the prediction of the Rashba effect in CH3NH3PbI3, that possesses large spin-orbit coupling, also point to a novel semiconductor system with highly promising properties for spin-based applications. Through circular pump-probe measurements, we demonstrate that highly polarized electrons of total angular momentum (J) with an initial degree of polarization Pini ∼90% (i.e., -30% degree of electron spin polarization) can be photogenerated in perovskites. Time-resolved Faraday rotation measurements reveal photoinduced Faraday rotation as large as 10°/μm at 200 K (at wavelength λ = 750 nm) from an ultrathin 70 nm film. These spin polarized carrier populations generated within the polycrystalline perovskite films, relax via intraband carrier spin-flip through the Elliot-Yafet mechanism. Through a simple two-level model, we elucidate the electron spin relaxation lifetime to be ∼7 ps and that of the hole is ∼1 ps. Our work highlights the potential of CH3NH3PbI3 as a new candidate for ultrafast spin switches in spintronics applications.read more
Citations
More filters
Journal ArticleDOI
State of the Art and Prospects for Halide Perovskite Nanocrystals.
Amrita Dey,Junzhi Ye,Apurba De,Elke Debroye,Seung Kyun Ha,Eva Bladt,Anuraj S. Kshirsagar,Ziyu Wang,Jun Yin,Jun Yin,Yue Wang,Li Na Quan,Li Na Quan,Fei Yan,Mengyu Gao,Mengyu Gao,Xiaoming Li,Javad Shamsi,Tushar Debnath,Muhan Cao,Manuel A. Scheel,Sudhir Kumar,Julian A. Steele,Marina Gerhard,Lata Chouhan,Ke Xu,Ke Xu,Xian-Gang Wu,Yanxiu Li,Yangning Zhang,Anirban Dutta,Chuang Han,Ilka Vincon,Andrey L. Rogach,Angshuman Nag,Anunay Samanta,Brian A. Korgel,Chih-Jen Shih,Daniel R. Gamelin,Dong Hee Son,Haibo Zeng,Haizheng Zhong,Handong Sun,Hilmi Volkan Demir,Hilmi Volkan Demir,Ivan G. Scheblykin,Iván Mora-Seró,Jacek K. Stolarczyk,Jin Z. Zhang,Jochen Feldmann,Johan Hofkens,Johan Hofkens,Joseph M. Luther,Julia Pérez-Prieto,Liang Li,Liberato Manna,Maryna I. Bodnarchuk,Maryna I. Bodnarchuk,Maksym V. Kovalenko,Maksym V. Kovalenko,Maarten B. J. Roeffaers,Narayan Pradhan,Omar F. Mohammed,Osman M. Bakr,Peidong Yang,Peter Müller-Buschbaum,Prashant V. Kamat,Qiaoliang Bao,Qiao Zhang,Roman Krahne,Raquel E. Galian,Samuel D. Stranks,Sara Bals,Vasudevanpillai Biju,William A. Tisdale,Yong Yan,Robert L. Z. Hoye,Lakshminarayana Polavarapu,Lakshminarayana Polavarapu +78 more
TL;DR: A comprehensive review of metal-halide perovskite nanocrystals can be found in this article, where researchers having expertise in different fields (chemistry, physics, and device engineering) have joined together to provide a state-of-the-art overview and future prospects of metalhalide nanocrystal research.
Journal ArticleDOI
Two-Photon-Pumped Perovskite Semiconductor Nanocrystal Lasers.
Yanqing Xu,Qi Chen,Chunfeng Zhang,Rui Wang,Hua Wu,Xiaoyu Zhang,Guichuan Xing,William W. Yu,Xiaoyong Wang,Yu Zhang,Min Xiao +10 more
TL;DR: Stable two-photon-pumped lasing is demonstrated at a remarkable low threshold by coupling CsPbBr3 nanocrystals with microtubule resonators and these findings suggest perovskite nanocry crystals can be used as excellent gain medium for high-performance frequency-up-conversion lasers toward practical applications.
Journal ArticleDOI
Rashba Spin–Orbit Coupling Enhanced Carrier Lifetime in CH3NH3PbI3
TL;DR: This work proposes an intrinsic mechanism for enhanced carrier lifetime in three-dimensional (3D) Rashba materials and demonstrates that the recombination rate is reduced due to the spin-forbidden transition.
Journal ArticleDOI
Chiral perovskite optoelectronics
Guankui Long,Randy P. Sabatini,Makhsud I. Saidaminov,Makhsud I. Saidaminov,Girish Lakhwani,Abdullah Rasmita,Xiaogang Liu,Edward H. Sargent,Weibo Gao,Weibo Gao +9 more
TL;DR: Chiral hybrid organic-inorganic perovskites (HOIPs) as discussed by the authors are a promising material for chiroptoelectronics, spintronics and ferroelectrics.
Journal ArticleDOI
Chemical Reduction of Intrinsic Defects in Thicker Heterojunction Planar Perovskite Solar Cells
Zonghao Liu,Zonghao Liu,Junnan Hu,Haoyang Jiao,Liang Li,Guanhaojie Zheng,Yihua Chen,Yuan Huang,Qing Zhang,Chao Shen,Qi Chen,Huanping Zhou +11 more
TL;DR: A simple methylamine solution-based additive is reported to improve film quality with nearly an order of magnitude reduction in intrinsic defect concentration, and an increase in carrier lifetime as a result of a decrease in shallow electronic disorder is observed.
References
More filters
Journal ArticleDOI
Spintronics: Fundamentals and applications
TL;DR: Spintronics, or spin electronics, involves the study of active control and manipulation of spin degrees of freedom in solid-state systems as discussed by the authors, where the primary focus is on the basic physical principles underlying the generation of carrier spin polarization, spin dynamics, and spin-polarized transport.
Journal ArticleDOI
Long-Range Balanced Electron- and Hole-Transport Lengths in Organic-Inorganic CH3NH3PbI3
Guichuan Xing,Nripan Mathews,Shuangyong Sun,Swee Sien Lim,Yeng Ming Lam,Michael Grätzel,Michael Grätzel,Subodh Mhaisalkar,Tze Chien Sum +8 more
TL;DR: Two studies show, using a variety of time-resolved absorption and emission spectroscopic techniques, that perovskite materials manifest relatively long diffusion paths for charge carriers energized by light absorption, highlighting effective carrier diffusion as a fruitful parameter for further optimization.
Journal ArticleDOI
Interface engineering of highly efficient perovskite solar cells
Huanping Zhou,Qi Chen,Gang Li,Song Luo,Tze Bing Song,Hsin Sheng Duan,Ziruo Hong,Jingbi You,Yongsheng Liu,Yang Yang +9 more
TL;DR: Perovskite films received a boost in photovoltaic efficiency through controlled formation of charge-generating films and improved current transfer to the electrodes and low-temperature processing steps allowed the use of materials that draw current out of the perovskites layer more efficiently.
Journal ArticleDOI
Low-temperature solution-processed wavelength-tunable perovskites for lasing
Guichuan Xing,Nripan Mathews,Swee Sien Lim,Natalia Yantara,Xinfeng Liu,Dharani Sabba,Michael Grätzel,Michael Grätzel,Subodh Mhaisalkar,Tze Chien Sum +9 more
TL;DR: It is revealed that solution-processed organic-inorganic halide perovskites (CH3NH3PbX3), which demonstrated huge potential in photovoltaics, also have promising optical gain and may show electrically driven lasing.
Journal ArticleDOI
Comparative study on the excitons in lead-halide-based perovskite-type crystals CH3NH3PbBr3 CH3NH3PbI3
TL;DR: In this article, the optical absorption and magneto-absorption spectra of the lead-halide-based perovskite-type crystals, CH3NH3PbX3 (X=Br, I) have been investigated.