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Interfacial Engineering of Perovskite Solar Cells by Employing a Hydrophobic Copper Phthalocyanine Derivative as Hole-Transporting Material with Improved Performance and Stability

Jiang, X. (author)
Yu, Z. (author)
Lai, J. (author)
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Zhang, Y. (author)
Hu, M. (author)
Lei, N. (author)
Wang, D. (author)
Yang, X. (author)
Sun, Licheng, 1962- (author)
KTH,Organisk kemi
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 (creator_code:org_t)
2017-03-16
2017
English.
In: ChemSusChem. - : Wiley-VCH Verlag. - 1864-5631 .- 1864-564X. ; 10:8, s. 1838-1845
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • In high-performance perovskite solar cells (PSCs), hole-transporting materials (HTMs) play an important role in extracting and transporting the photo-generated holes from the perovskite absorber to the cathode, thus reducing unwanted recombination losses and enhancing the photovoltaic performance. Herein, solution-processable tetra-4-(bis(4-tert-butylphenyl)amino)phenoxy-substituted copper phthalocyanine (CuPc-OTPAtBu) was synthesized and explored as a HTM in PSCs. The optical, electrochemical, and thermal properties were fully characterized for this organic metal complex. The photovoltaic performance of PSCs employing this CuPc derivative as a HTM was further investigated, in combination with a mixed-ion perovskite as a light absorber and a low-cost vacuum-free carbon as cathode. The optimized devices [doped with 6 % (w/w) tetrafluoro-tetracyano-quinodimethane (F4TCNQ)] showed a decent power conversion efficiency of 15.0 %, with an open-circuit voltage of 1.01 V, a short-circuit current density of 21.9 mA cm−2, and a fill factor of 0.68. Notably, the PSC devices studied also exhibited excellent long-term durability under ambient condition for 720 h, mainly owing to the introduction of the hydrophobic HTM interlayer, which prevents moisture penetration into the perovskite film. The present work emphasizes that solution-processable CuPc holds a great promise as a class of alternative HTMs that can be further explored for efficient and stable PSCs in the future.

Subject headings

NATURVETENSKAP  -- Kemi -- Organisk kemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Organic Chemistry (hsv//eng)

Keyword

copper phthalocyanine
hole-transporting materials
perovskite solar cells
stability
sustainable energy
Carbon
Cathodes
Cell engineering
Convergence of numerical methods
Copper
Electrodes
Field effect transistors
Hole mobility
Hydrophobicity
Metal complexes
Nitrogen compounds
Open circuit voltage
Organic polymers
Perovskite
Solar cells
Solar power generation
Long term durability
Organic metal complex
Photovoltaic performance
Power conversion efficiencies
Solution processable

Publication and Content Type

ref (subject category)
art (subject category)

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