Type
ArticleAuthors
Peng, Wei
Yin, Jun

Ho, Kang-Ting

Ouellette, Olivier

de Bastiani, Michele
Banavoth, Murali

El Tall, Omar
Shen, Chao

Miao, Xiaohe
Pan, Jun

Alarousu, Erkki
He, Jr-Hau

Ooi, Boon S.

Mohammed, Omar F.

Sargent, Edward H.

Bakr, Osman

KAUST Department
Analytical Chemistry Core LabChemical Science Program
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Functional Nanomaterials Lab (FuNL)
Imaging and Characterization Core Lab
KAUST Catalysis Center (KCC)
KAUST Solar Center (KSC)
Material Science and Engineering Program
Nano Energy Lab
Photonics Laboratory
Physical Characterization
Physical Science and Engineering (PSE) Division
Solids
Ultrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
Date
2017-06-28Online Publication Date
2017-06-28Print Publication Date
2017-08-09Permanent link to this record
http://hdl.handle.net/10754/625170
Metadata
Show full item recordAbstract
Unintentional self-doping in semiconductors through shallow defects is detrimental to optoelectronic device performance. It adversely affects junction properties and it introduces electronic noise. This is especially acute for solution-processed semiconductors, including hybrid perovskites, which are usually high in defects due to rapid crystallization. Here, we uncover extremely low self-doping concentrations in single crystals of (C6H5C2H4NH3)2PbI4・(CH3NH3PbI3)n-1 (n=1, 2, and 3)—over three orders of magnitude lower than those of typical three-dimensional hybrid perovskites—by analyzing their conductivity behavior. We propose that crystallization of hybrid perovskites containing large organic cations suppresses defect formation and thus favors a low self-doping level. To exemplify the benefits of this effect, we demonstrate extraordinarily high light-detectivity (1013 Jones) in (C6H5C2H4NH3)2PbI4・(CH3NH3PbI3)n-1 photoconductors due to the reduced electronic noise, which makes them particularly attractive for the detection of weak light signals. Furthermore, the low self-doping concentration reduces the equilibrium charge carrier concentration in (C6H5C2H4NH3)2PbI4・(CH3NH3PbI3)n-1, advantageous in the design of p-i-n heterojunction solar cells by optimizing band alignment and promoting carrier depletion in the intrinsic perovskite layer, thereby enhancing charge extraction.Citation
Peng W, Yin J, Ho K-T, Ouellette O, De Bastiani M, et al. (2017) Ultralow Self-Doping in 2D Hybrid Perovskite Single Crystals. Nano Letters. Available: http://dx.doi.org/10.1021/acs.nanolett.7b01475.Sponsors
Financial support for this work was provided by KAUST. W.P. would like to acknowledge Chun Ma at KAUST for his valuable suggestions on the measurement of photodetector noise, Feng Li and Ting-You Li at KAUST for their assistance in measuring temperature-dependent conductivity.Publisher
American Chemical Society (ACS)Journal
Nano LettersPubMed ID
28657752Additional Links
http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.7b01475ae974a485f413a2113503eed53cd6c53
10.1021/acs.nanolett.7b01475
Scopus Count
Collections
Articles; Analytical Chemistry Core Lab; Imaging and Characterization Core Lab; Physical Science and Engineering (PSE) Division; Electrical and Computer Engineering Program; Chemical Science Program; Material Science and Engineering Program; Photonics Laboratory; KAUST Catalysis Center (KCC); KAUST Solar Center (KSC); Computer, Electrical and Mathematical Science and Engineering (CEMSE) DivisionRelated articles
- Interfacial Molecular Doping of Metal Halide Perovskites for Highly Efficient Solar Cells.
- Authors: Jiang Q, Ni Z, Xu G, Lin Y, Rudd PN, Xue R, Li Y, Li Y, Gao Y, Huang J
- Issue date: 2020 Aug
- Tuning Hot Carrier Cooling Dynamics by Dielectric Confinement in Two-Dimensional Hybrid Perovskite Crystals.
- Authors: Yin J, Maity P, Naphade R, Cheng B, He JH, Bakr OM, Brédas JL, Mohammed OF
- Issue date: 2019 Nov 26
- Thousand-fold Conductivity Increase in 2D Perovskites by Polydiacetylene Incorporation and Doping.
- Authors: Ortiz-Cervantes C, Román-Román PI, Vazquez-Chavez J, Hernández-Rodríguez M, Solis-Ibarra D
- Issue date: 2018 Oct 15
- Two-Dimensional Perovskite (PEA)(2)PbI(4) Two-Color Blue-Green Photodetector.
- Authors: Dou W, Yin Z, Zhang Y, Deng H, Dai N
- Issue date: 2022 Jul 25
- Inkjet-Printed Photodetector Arrays Based on Hybrid Perovskite CH(3)NH(3)PbI(3) Microwires.
- Authors: Liu Y, Li F, Perumal Veeramalai C, Chen W, Guo T, Wu C, Kim TW
- Issue date: 2017 Apr 5