Long-Range Balanced Electron- and Hole-Transport Lengths in Organic-Inorganic CH 3 NH 3 PbI 3

American Association for the Advancement of Science (AAAS) - Tập 342 Số 6156 - Trang 344-347 - 2013
Guichuan Xing1, Nripan Mathews2,3,4, Shuangyong Sun3, Swee Sien Lim1, Yeng Ming Lam5,3, Michaël Grätzel6, Subodh G. Mhaisalkar2,3, Tze Chien Sum1
1Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University (NTU), 21 Nanyang Link, 637371 Singapore
2Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, 637553, Singapore
3School of Materials Science and Engineering, NTU, Nanyang Avenue, 639798 Singapore.
4Singapore-Berkeley Research Initiative for Sustainable Energy, 1 Create Way, 138602, Singapore
5Institute of Materials for Electronic Engineering II, Rheinisch Westfälische Technische Hochschule–Aachen, Sommerfeldstrasse 24, D-52074 Aachen, Germany.
6Laboratory of Photonics and Interfaces, Department of Chemistry and Chemical Engineering, Swiss Federal Institute of Technology, Station 6, CH-1015 Lausanne, Switzerland

Tóm tắt

Unrestricted Travel in Solar Cells In the past 2 years, organolead halide perovskites have emerged as a promising class of light-harvesting media in experimental solar cells, but the physical basis for their efficiency has been unclear (see the Perspective by Hodes ). Two studies now show, using a variety of time-resolved absorption and emission spectroscopic techniques, that these materials manifest relatively long diffusion paths for charge carriers energized by light absorption. Xing et al. (p. 344 ) independently assessed (negative) electron and (positive) hole diffusion lengths and found them well-matched to one another to the ~100-nanometer optical absorption depth. Stranks et al. (p. 341 ) uncovered a 10-fold greater diffusion length in a chloride-doped material, which correlates with the material's particularly efficient overall performance. Both studies highlight effective carrier diffusion as a fruitful parameter for further optimization.

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10.1021/ja2073643

10.1021/cm102419z

10.1039/c2cs35374a

10.1002/adma.200501152

10.1038/nmat2629

10.1038/ncomms3004

10.1038/353737a0

10.1126/science.1209688

10.1038/nature12340

10.1038/srep00591

10.1038/nphoton.2013.80

10.1126/science.1228604

10.1021/ja307789s

10.1039/c3ee40810h

10.1002/adfm.200500573

10.1002/adfm.200305049

10.1021/jp904229q

10.1007/s10853-005-0568-0

10.1021/jp072306z

10.1039/c1nr10867k

10.1002/adma.200800982

10.1103/PhysRevB.59.15346

10.1021/jp0217738

10.1002/adma.200902827

10.1038/nmat2872

10.1063/1.1534621

10.1021/nn402197a

10.1146/annurev.physchem.58.032806.104537

10.1103/PhysRevLett.94.097401

10.1038/nmat3502

10.1021/jz3000382

10.1002/adfm.200902099

10.1021/nl102712x

10.1038/nmat3500

10.1039/c3ta10518k

10.1126/science.286.5441.945

10.1126/science.267.5203.1473

10.1002/adma.200601093

10.1021/nl4024287

10.1088/2040-8978/14/10/105701

10.1021/nn304200a

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American Association for the Advancement of Science (AAAS)

Tập 342 Số 6156

344-347

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