Charge extraction via graded doping of hole transport layers gives highly luminescent and stable metal halide perovskite devices

Science Advances
Mojtaba Abdi-JalebiRichard H Friend

Abstract

One source of instability in perovskite solar cells (PSCs) is interfacial defects, particularly those that exist between the perovskite and the hole transport layer (HTL). We demonstrate that thermally evaporated dopant-free tetracene (120 nm) on top of the perovskite layer, capped with a lithium-doped Spiro-OMeTAD layer (200 nm) and top gold electrode, offers an excellent hole-extracting stack with minimal interfacial defect levels. For a perovskite layer interfaced between these graded HTLs and a mesoporous TiO2 electron-extracting layer, its photoluminescence yield reaches 15% compared to 5% for the perovskite layer interfaced between TiO2 and Spiro-OMeTAD alone. For PSCs with graded HTL structure, we demonstrate efficiency of up to 21.6% and an extended power output of over 550 hours of continuous illumination at AM1.5G, retaining more than 90% of the initial performance and thus validating our approach. Our findings represent a breakthrough in the construction of stable PSCs with minimized nonradiative losses.

References

Nov 7, 2003·Organic Letters·Susan A OdomJohn E Anthony
Sep 28, 2010·Advanced Materials·Richa Pandey, Russell J Holmes
Nov 17, 2011·Journal of the American Chemical Society·Paul M ZimmermanMartin Head-Gordon
Oct 6, 2014·Nature Materials·Nicholas J ThompsonMarc A Baldo
Oct 6, 2014·Nature Materials·Maxim TabachnykAkshay Rao
Nov 10, 2015·ACS Nano·Claire L ArmstrongKevin P Musselman
Dec 19, 2015·ACS Nano·Antonio GuerreroYang Yang
Jul 30, 2016·The Journal of Physical Chemistry Letters·Mojtaba Abdi-JalebiRichard H Friend
Dec 23, 2016·Nature Communications·Johannes M RichterRichard H Friend
Apr 1, 2017·Journal of Visualized Experiments : JoVE·Mojtaba Abdi-JalebiRichard H Friend
Jun 2, 2017·Nature Communications·G GranciniMohammad Khaja Nazeeruddin
Mar 15, 2018·The Journal of Physical Chemistry Letters·Luis M Pazos-OutónEli Yablonovitch
Apr 25, 2018·Nature Materials·Henry J Snaith
Jun 29, 2018·ACS Nano·Mojtaba Abdi-JalebiRichard H Friend

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Citations

Dec 14, 2019·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Mohd Taukeer KhanShahzada Ahmad
May 20, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Apurba MahapatraPankaj Yadav
Apr 24, 2021·Nature Materials·Nobuya SakaiHenry J Snaith
Jul 10, 2021·ACS Applied Materials & Interfaces·Ali BuyrukTayebeh Ameri
Dec 12, 2019·ACS Applied Materials & Interfaces·Qingquan HeBiwu Ma
Nov 2, 2019·ACS Applied Materials & Interfaces·Hossein TaherianfardMahdi Malekshahi Byranvand

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Methods Mentioned

BETA
scanning electron microscopy
light scattering

Software Mentioned

LabVIEW
Solstice

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