DataVXAdvanced MaterialsPaper
journal article·2018-10Open access

Picosecond Capture of Photoexcited Electrons Improves Photovoltaic Conversion in MAPbI3:C70‐Doped Planar and Mesoporous Solar Cells

Saba Gharibzadeh, Franco Valduga de Almeida Camargo, Cristina Roldán‐Carmona, Grégoire Clément Gschwend, Jorge Pascual, Ramón Tena‐Zaera, Giulio Cerullo, Giulia Grancini, Mohammad Khaja Nazeeruddin

Advanced Materials· Volume 30· Issue 40
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Source abstract

Abstract

Abstract In this work, solar cells based on methylammonium lead iodide (MAPbI3) doped in solution with C70 fullerene in a mesoporous as well as planar electron‐transporting layer (ETL)‐free architecture are realized, showcasing in the latter case a record efficiency of 15.7% and an improved open‐circuit voltage (VOC). Contrary to the bulk heterojunction previously reported, the C70 molecules do not phase segregate and they are rather finely dispersed in the perovskite film, possibly infiltrating at the grain boundaries, while assisting the growth of a highly uniform perovskite layer. By means of time‐resolved femtosecond‐to‐nanosecond optical spectroscopy, with an extended spectral coverage, it is observed that electrons photogenerated in the perovskite are transferred to C70 with a time constant of 20 ps. Despite being captured by C70, electrons are not deeply trapped and can potentially bounce back into the perovskite, as suggested by the high fill factor and enhanced VOC of the MAPbI3:C70 solar cells, especially in the case of the ETL‐free device configuration.
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Research context

NanomaterialsElectronic materials

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Group for Molecular Engineering of Functional Materials Ecole Polytechnique Fédérale Lausanne Valais Wallis Sion CH‐1951 Switzerland

Department of Physics Tarbiat Modares University P.O. Box 14115‐175 Tehran 14117‐13116 Iran

Istituto di Fotonica e Nanotecnologie del CNR Dipartimento di Fisica Politecnico di Milano P.zza L. da Vinci 32 20133 Milano Italy

LEPA Ecole Polytechnique Fédérale Lausanne Valais Wallis Sion CH‐1951 Switzerland

IK4‐CIDETEC Parque Tecnológico de San Sebastián Paseo Miramón 196 Donostia‐San Sebastián 20009 Spain

POLYMAT University of the Basque Country UPV/EHU Avenida de Tolosa 72 Donostia‐San Sebastián 20018 Spain

Funding

Horizon 2020 Framework Programme · Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung · Ministerio de Economía y Competitividad

References (45)

Show source-provided references
1. 10.1126/science.aah555710.1126/science.aah5557 ↗
2. 10.1039/C6EE03397K10.1039/C6EE03397K ↗
3. 10.1126/science.aan230110.1126/science.aan2301 ↗
4. https://www.nrel.gov/pv/assets/images/efficiency‐chart‐20180716.jpg (accessed: August 2018).
5. 10.1126/science.122860410.1126/science.1228604 ↗
6. 10.1039/C5EE02555A10.1039/C5EE02555A ↗
7. 10.1021/ja413224610.1021/ja4132246 ↗
8. 10.1002/cssc.20160107010.1002/cssc.201601070 ↗
9. 10.1126/science.124398210.1126/science.1243982 ↗
10. 10.1021/acs.jpcc.6b0720010.1021/acs.jpcc.6b07200 ↗
11. 10.1021/acs.chemmater.6b0325910.1021/acs.chemmater.6b03259 ↗
12. Shao Y. · Nat. Commun. · 2014 · 5 · 578
13. 10.1038/ncomms808110.1038/ncomms8081 ↗
14. 10.1021/acsenergylett.6b0065710.1021/acsenergylett.6b00657 ↗
15. 10.1039/C4EE01138D10.1039/C4EE01138D ↗
16. 10.1038/nphoton.2016.310.1038/nphoton.2016.3 ↗
17. 10.1039/C5EE00222B10.1039/C5EE00222B ↗
18. 10.1021/jacs.5b0877010.1021/jacs.5b08770 ↗
19. 10.1002/aenm.20160234910.1002/aenm.201602349 ↗
20. 10.1002/advs.20150035310.1002/advs.201500353 ↗
21. 10.1038/nphoton.2013.34210.1038/nphoton.2013.342 ↗
22. 10.1126/science.125476310.1126/science.1254763 ↗
23. 10.1038/ncomms1568410.1038/ncomms15684 ↗
24. 10.1002/cssc.20170018010.1002/cssc.201700180 ↗
25. 10.1021/ja508758k10.1021/ja508758k ↗
26. 10.1002/cssc.20160094010.1002/cssc.201600940 ↗
27. 10.1038/nphoton.2015.15110.1038/nphoton.2015.151 ↗
28. 10.1002/cphc.20170049210.1002/cphc.201700492 ↗
29. 10.1021/acs.jpclett.6b0065310.1021/acs.jpclett.6b00653 ↗
30. 10.1039/C4EE01358A10.1039/C4EE01358A ↗
31. 10.1021/ja506624n10.1021/ja506624n ↗
32. 10.1103/PhysRevApplied.2.03400710.1103/PhysRevApplied.2.034007 ↗
33. 10.1021/acs.jpclett.5b0095310.1021/acs.jpclett.5b00953 ↗
34. 10.1039/C7CP04417H10.1039/C7CP04417H ↗
35. 10.1021/jacs.6b0646310.1021/jacs.6b06463 ↗
36. 10.1038/nphoton.2013.37410.1038/nphoton.2013.374 ↗
37. 10.1021/ja504632z10.1021/ja504632z ↗
38. 10.1126/science.124316710.1126/science.1243167 ↗
39. 10.1103/PhysRevB.93.16120510.1103/PhysRevB.93.161205 ↗
40. 10.1021/ja512833n10.1021/ja512833n ↗
41. 10.1021/ja412583t10.1021/ja412583t ↗
42. 10.1039/C5CP01119A10.1039/C5CP01119A ↗
43. 10.1038/s41467-017-00546-z10.1038/s41467-017-00546-z ↗
44. 10.1063/1.491607910.1063/1.4916079 ↗
45. 10.1063/1.496011210.1063/1.4960112 ↗