Annealing-free efficient vacuum-deposited planar perovskite solar cells with evaporated fullerenes as electron-selective layers

, "Pathways toward highperformance perovskite solar cells: review of recent advances in organo-metal halide perovskites for photovoltaic applications," J. Photon. Energy 6(2), 022001 (2016), doi: 10.1117/1.JPE.6.022001. Abstract. Organo-metal halide perovskite-based solar cells have been the focus of intense research over the past five years, and power conversion efficiencies have rapidly been improved from 3.8 to >21%. This article reviews major advances in perovskite solar cells that have contributed to the recent efficiency enhancements, including the evolution of device architecture, the development of material deposition processes, and the advanced device engineering techniques aiming to improve control over morphology, crystallinity, composition, and the interface properties of the perovskite thin films. The challenges and future directions for perovskite solar cell research and development are also discussed.

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“…Thus, only a few research groups have reported high-efficiency devices prepared by this method. 29,31,60,81,82 …”

Section: Thermal Vapor Depositionmentioning

confidence: 99%

Pathways toward high-performance perovskite solar cells: review of recent advances in organo-metal halide perovskites for photovoltaic applications

et al. 2016

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“…), solution deposition is a simple and low-cost way to fabricate high efficiency PSCs. [5][6][21][22][23][24][25][26][27][28][29][30][31] Several researches have been reported in obtaining high quality perovskite films based on growth engineering, solvent engineering and so on. In 2016, M. Dar and his coworkers studied the impact of chloride on the conversion of lead halide into CH3NH3PbI3.…”

Section: Introductionmentioning

confidence: 99%

Stitching triple cation perovskite by a mixed anti-solvent process for high performance perovskite solar cells

et al. 2017

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With the rapid development of organic-inorganic lead halide perovskite photovoltaics, increasingly more attentions are paid to explore the growth mechanism and precisely control the quality of perovskite films. In this study, we propose a "stitching effect" to fabricate high quality perovskite films by using chlorobenzene (CB) as an anti-solvent and isopropyl alcohol (IPA) as an additive into this anti-solvent. Because of the existence of IPA, CB can be efficiently released from the gaps of perovskite precursors and the perovskite film formation can be slightly modified in a controlled manner. More homogeneous surface morphology and larger grain size of perovskite films were achieved via this process. The reduced grain boundaries ensure low surface defect density and good carrier transport in the perovskite layer. Meanwhile, we also performed the Fourier transform infrared (FTIR) spectroscopy to investigate the film growth mechanism of unannealed and annealed perovskite films. Solar cells fabricated by using the "stitching effect" exhibited a best efficiency of 19.2%. Our results show that solvent and solvent additives dramatically influenced the formation and crystallization processes for perovskite materials due to their different coordination and extraction capabilities. This method presents a new path towards controlling the growth and morphology of perovskite films.

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“…40 nm between FTO and CH 3 NH 3 PbI 3 ( Figure 8). It should also be noted here that the cell configuration of FTO/C 60 /CH 3 NH 3 PbI 3 /HSL/Au allows establishment of a cascading energetics sequence (Figure 7b), [26][27][28][29]36 making it possible to derive the electrons and holes in the cell upon illumination.…”

Section: Resultsmentioning

confidence: 95%

“…24,25 In comparison with [60]PCBM, the pristine C 60 with no bulky substituents is expected to be packed more densely to facilitate the intermolecular charge transport. [26][27][28][29][30] * Electrochemical Society Fellow. z E-mail: umeyama@scl.kyoto-u.ac.jp; imahori@scl.kyoto-u.ac.jp Actually, it was reported that the planar PSC device with C 60 ESL outperforms the device with [60]PCBM ESL in the p-i-n architecture, ITO/PEDOT:PSS (HSL)/CH 3 NH 3 PbI 3 /fullerene/Ag.…”

mentioning

confidence: 99%

Thermal Precursor Approach to Pristine Fullerene Film as Electron Selective Layer in Perovskite Solar Cells

Umeyama

Matano

Shibata

et al. 2017

ECS J. Solid State Sci. Technol.

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In perovskite solar cells (PSCs), electron selective layers (ESLs) assume a crucial role in blocking holes and transporting electrons for high performances. To achieve low-temperature solution processing of PSCs, organic n-type materials such as fullerene-based molecules have recently been employed to replace a typical TiO 2 ESL that requires high temperature (>450 • C) for fabrication. Herein, soluble C 60 -9-methylanthracene mono-adduct (C 60 (9MA)) is used as a thermal precursor to the C 60 ESL in planar PSCs.The best performing PSC device shows a power conversion efficiency of 15.0% under the simulated AM 1.5G one sun illumination, which is superior to that of the device with compact TiO 2 as an ESL (12.9%). Remarkably, a fill factor of the C 60 -based PSC (0.723) is enhanced compared to that of the TiO 2 -based one (0.671) owing to the low charge-transfer resistance at the interface of C 60 -perovskite. These results suggest that the thermal precursor approach to pristine fullerene films is a promising approach for fabricating ESL in high-performance PSCs with relatively low fabrication temperature (<140 • C).

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Annealing-free efficient vacuum-deposited planar perovskite solar cells with evaporated fullerenes as electron-selective layers

Abstract: Pe r o v sk it e so l a r c el l s, v a c u u m-d epo sit io n , el ec t r o n -s el ec t iv e l a y er , h o l e bl o c k in g l a y er , C 60 a n d C 70 (f u l l er en es )

Cited by 131 publications

References 50 publications

Pathways toward high-performance perovskite solar cells: review of recent advances in organo-metal halide perovskites for photovoltaic applications

Pathways toward high-performance perovskite solar cells: review of recent advances in organo-metal halide perovskites for photovoltaic applications

Stitching triple cation perovskite by a mixed anti-solvent process for high performance perovskite solar cells

Thermal Precursor Approach to Pristine Fullerene Film as Electron Selective Layer in Perovskite Solar Cells

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