Large Conduction Band Energy Offset Is Critical for High Fill Factors in Inorganic Perovskite Solar Cells - Details

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Abstract：

Although　SnO2　has　been　reported　to　give　high　efficiencies　of　over　20%　for　organic-inorganic　perovskite　solar　cells　and　has　been　frequently　used　in　perovskite　tandem　solar　cells,　very　few　contributions　have　explored　its　feasibility　in　inorganic　perovskite　solar　cells　(IPSCs).　Inorganic　perovskites　with　a　wide　bandgap　tunable　from　1.7　to　2.0　eV　are　promising　candidates　for　top　cells　in　tandem　structures;　development　of　IPSCs　based　on　SnO2　will　greatly　benefit　their　integration　into　tandem　solar　cells.　We　examined　SnO2　in　comparison　to　the　prevalent　TiO2.　We　found　that　although　SnO2　had　a　good　energy　alignment　with　the　inorganic　perovskite　and　exhibited　slower　nonradiative　recombination,　the　relatively　low　conduction　band　minimum　energy　offset　restricted　efficient　charge　extraction.　In　contrast,　TiO2　that　had　a　large　energy　offset　of　∼400　meV　led　to　a　high　fill　factor　of　78.7%　and　a　state-of-the-art　efficiency　of　14.2%　for　IPSCs　with　a　bandgap　of　1.93　eV.　Copyright　©　2020　American　Chemical　Society.

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[ 1 ] [Wang, Q.]Young Investigator Group Active Materials and Interfaces for Stable Perovskite Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstraße 5, Berlin, 12489, Germany
[ 2 ] [Zu, F.]Institut für Physik and Iris Adlershof, Humboldt-Universität zu Berlin, Berlin, 12489, Germany
[ 3 ] [Caprioglio, P.]Institute for Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Straße 24-25, Potsdam-Golm, 14476, Germany
[ 4 ] [Caprioglio, P.]Young Investigator Group Perovskite Tandem Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstraße 5, Berlin, 12489, Germany
[ 5 ] [Caprioglio, P.]Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstraße 5, Berlin, 12489, Germany
[ 6 ] [Wolff, C.M.]Institute for Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Straße 24-25, Potsdam-Golm, 14476, Germany
[ 7 ] [Stolterfoht, M.]Institute for Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Straße 24-25, Potsdam-Golm, 14476, Germany
[ 8 ] [Li, M.]Young Investigator Group Active Materials and Interfaces for Stable Perovskite Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstraße 5, Berlin, 12489, Germany
[ 9 ] [Li, M.]Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
[ 10 ] [Turren-Cruz, S.-H.]Young Investigator Group Active Materials and Interfaces for Stable Perovskite Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstraße 5, Berlin, 12489, Germany
[ 11 ] [Koch, N.]Institut für Physik and Iris Adlershof, Humboldt-Universität zu Berlin, Berlin, 12489, Germany
[ 12 ] [Koch, N.]Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China
[ 13 ] [Koch, N.]Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Kekuléstraße 5, Berlin, 12489, Germany
[ 14 ] [Neher, D.]Institute for Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Straße 24-25, Potsdam-Golm, 14476, Germany
[ 15 ] [Abate, A.]Young Investigator Group Active Materials and Interfaces for Stable Perovskite Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstraße 5, Berlin, 12489, Germany
[ 16 ] [Abate, A.]Department of Chemical, Materials and Production Engineering, University of Naples Federioco Ii, Piazzale Tecchio 80, Fuorigrotta, Naples, 80125, Italy
[ 17 ] [Abate, A.]State Key Laboratory of Photocatalysis on Energy and Environment, Institute of Advanced Energy Materials, Fuzhou University, Fuzhou, Fujian, 350002, China

Reprint 's Address：

[Wang, Q.]Young Investigator Group Active Materials and Interfaces for Stable Perovskite Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie, Young Investigator Group Active Materials and Interfaces for Stable Perovskite Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstraße 5, Germany

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qiong.wang@helmholtz-berlin.de

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Source ：

ACS Energy Letters

ISSN： 2380-8195

Year： 2020

Issue： 7

Volume： 5

Page： 2343-2348

2 3 . 1 0 1

JCR@2020

1 9 . 5 0 0

JCR@2023

ESI HC Threshold：196

JCR Journal Grade：1

CAS Journal Grade：1

Cited Count：

WoS CC Cited Count：

SCOPUS Cited Count： 21

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 2

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