Efficient luminescent solar cells based on tailored mixed-cation perovskites

Science Advances
Dongqin BiAnders Hagfeldt

Abstract

We report on a new metal halide perovskite photovoltaic cell that exhibits both very high solar-to-electric power-conversion efficiency and intense electroluminescence. We produce the perovskite films in a single step from a solution containing a mixture of FAI, PbI2, MABr, and PbBr2 (where FA stands for formamidinium cations and MA stands for methylammonium cations). Using mesoporous TiO2 and Spiro-OMeTAD as electron- and hole-specific contacts, respectively, we fabricate perovskite solar cells that achieve a maximum power-conversion efficiency of 20.8% for a PbI2/FAI molar ratio of 1.05 in the precursor solution. Rietveld analysis of x-ray diffraction data reveals that the excess PbI2 content incorporated into such a film is about 3 weight percent. Time-resolved photoluminescence decay measurements show that the small excess of PbI2 suppresses nonradiative charge carrier recombination. This in turn augments the external electroluminescence quantum efficiency to values of about 0.5%, a record for perovskite photovoltaics approaching that of the best silicon solar cells. Correspondingly, the open-circuit photovoltage reaches 1.18 V under AM 1.5 sunlight.

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Citations

Mar 19, 2016·The Journal of Physical Chemistry Letters·Elizabeth S ParrottLaura M Herz
Aug 31, 2016·Topics in Current Chemistry·Michele SessoloHenk J Bolink
Jul 21, 2016·Journal of the American Chemical Society·T Jesper JacobssonAnders Hagfeldt
Aug 6, 2016·The Journal of Physical Chemistry Letters·Mona MittalSameer Sapra
Jul 30, 2016·The Journal of Physical Chemistry Letters·Mojtaba Abdi-JalebiRichard H Friend
Oct 30, 2016·Proceedings of the National Academy of Sciences of the United States of America·Young-Hoon KimTae-Woo Lee
Nov 3, 2016·Journal of the American Chemical Society·Yi ZhangMohammad Khaja Nazeeruddin
Oct 25, 2016·ACS Nano·Laurent PedesseauMikaël Kepenekian
Nov 2, 2016·ACS Applied Materials & Interfaces·Chengbo TianLuis Echegoyen
Dec 23, 2016·Nature Communications·Philip CaladoPiers R F Barnes
Jan 5, 2017·The Journal of Physical Chemistry Letters·Dehui LiXiangfeng Duan
Dec 29, 2016·ACS Applied Materials & Interfaces·Xuewen YinHong Lin
Dec 21, 2016·ACS Applied Materials & Interfaces·Xiaodong RenShengzhong Frank Liu
Dec 30, 2016·ACS Applied Materials & Interfaces·Yu-Hsien ChiangPeter Chen
Jan 17, 2017·ACS Applied Materials & Interfaces·Xiaoli ZhangXiao Wei Sun
Feb 18, 2017·ACS Applied Materials & Interfaces·Haejun YuJyongsik Jang
Mar 7, 2017·The Journal of Physical Chemistry Letters·Thomas Kirchartz, Uwe Rau
Apr 12, 2017·ACS Applied Materials & Interfaces·Fengying ZhangKeli Han

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Methods Mentioned

BETA
scanning electron microscopy
x-ray diffraction

Software Mentioned

FluorEssence

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