Perovskite-Based Solar Cells With Nickel-Oxidized Nickel Oxide Hole Transfer Layer

Lai, Wei-Chih; Lin, Kun-Wei; Guo, Tzung‐Fang; Lee, Jung

doi:10.1109/ted.2015.2413671

Cited by 26 publications

(9 citation statements)

References 30 publications

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“…Uniformity of the HTL film is an important factor because it can directly affect the morphology of following photoactive layer. Unlike in former works 27 30 32 in which additional effort was needed to optimize the morphology of the perovskite photoactive layer on the NiO layer because of its nonuniformity, our uniform NiO layer could be prepared on ITO by simply spin-casting NiO NP solution, as shown in the AFM ( Fig. 1a,b,e ) and SEM images (inset of Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The work function ( ϕ ) of the NiO layer, defined as ϕ = 21.21 − ( E cutoff − E i ), was calculated to be 5.37 eV. The configuration of our device (glass/ITO/NiO/CH 3 NH 3 PbI 3 /PCBM/LiF/Al) and the energy levels of each layer 21 22 23 24 25 26 27 28 29 30 31 32 33 34 are depicted in Fig. 3 .…”

Section: Resultsmentioning

confidence: 99%

“…used NiO x film, prepared by sputtering, in perovskite PV cells that had a maximum PCE of 11.6% 25 . For those studies that used solution-based NiO layers, not only was the sol-gel method used to prepare the NiO layer, requiring high-temperature annealing to convert the precursors to NiO or to promote crystallization, but also the PCEs were around 10% 23 26 27 28 29 30 31 32 . The solution-based NiO x layer of Jen et al .…”

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confidence: 99%

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Solution-Processible Crystalline NiO Nanoparticles for High-Performance Planar Perovskite Photovoltaic Cells

Kwon

Kim

Nguyen

et al. 2016

Sci Rep

189

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In this work, we report on solution-based p-i-n-type planar-structured CH3NH3PbI3 perovskite photovoltaic (PV) cells, in which precrystallized NiO nanoparticles (NPs) without post-treatment are used to form a hole transport layer (HTL). X-ray diffraction and high-resolution transmission electron microscopy showed the crystallinity of the NPs, and atomic force microscopy and scanning electron microscopy confirmed the uniform surfaces of the resultant NiO thin film and the subsequent perovskite photoactive layer. Compared to the conventional poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) HTL, the NiO HTL had excellent energy-level alignment with that of CH3NH3PbI3 and improved electron-blocking capability, as analyzed by photoelectron spectroscopy and diode modeling, resulting in Voc ~0.13 V higher than conventional PEDOT:PSS-based devices. Consequently, a power conversion efficiency (PCE) of 15.4% with a high fill factor (FF, 0.74), short-circuit current density (Jsc, 20.2 mA·cm−2), and open circuit voltage (Voc, 1.04 V) having negligible hysteresis and superior air stability has been achieved.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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confidence: 99%

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Solution-Processible Crystalline NiO Nanoparticles for High-Performance Planar Perovskite Photovoltaic Cells

Kwon

Kim

Nguyen

et al. 2016

Sci Rep

189

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“…The majority of work on inverted planar cell structures is based on ITO substrates to achieve smooth interfaces. For example, Lai et al reported a PCE of 7.75 % for ITO/NiOx/CH3NH3PbI3/PCBM/BCP/Al cell structures which involved additional high-temperature annealing at 450 °C [27]. More recently, Weber et al reported a PCE of 12.8% for a small scale (0.09 cm 2 ) p-i-n device with a cell configuration of ITO/NiOx/PK/PC60BM/Ag using a Cs0.08(MA0.17FA0.83)0.92Pb(I0.83Br0.17)3 based PK [28].…”

Section: Resultsmentioning

confidence: 99%

Improved FTO/NiO_x Interfaces for Inverted Planar Triple-Cation Perovskite Solar Cells

Afzaal

Yates

Walter

et al. 2019

IEEE J. Photovoltaics

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Front electrodes of fluorine doped tin oxide (FTO) thin films and hole transporting layers of nickel oxide thin films have been combined to fabricate 1.063 cm 2 inverted planar solar cells with cesium-containing triple cation perovskites as absorber layers. Using atmospheric pressure chemical vapor deposition FTO layers were obtained with low sheet resistance, decreased root mean square roughness, increased transmission, and reduced optical haze values compared to a widely used commercial FTO substrate. Cell performance outperformed the equivalent cells fabricated using the commercial FTO. With full illumination under maximum power point tracking, a stabilized power conversion efficiency of 13.78 % was obtained for the champion device.

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“…Although reactive evaporation of NiO x has been reported, its electronic properties, such as conductivity and work function, have not been reported . Generally, the fabrication of efficient NiO x films by evaporation often involves two steps: deposition of Ni metal films first and oxidation into NiO x later . The NiO x deposited in this way were highly dense, with excellent electron blocking property.…”

Section: Niox‐based Planar Pscsmentioning

confidence: 99%

Nickel Oxide as Efficient Hole Transport Materials for Perovskite Solar Cells

Yin¹,

Guo²,

Xie³

et al. 2019

Solar RRL

182

127

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Organic–inorganic halide perovskite solar cells (PSCs) have achieved great success in recent years with a demonstrated power conversion efficiency (PCE) increasing rapidly from 3.8% to 22.3% for single junction devices. Most high‐performance PSCs consist of a perovskite absorber sandwiched between an electron transport layer (ETL) and a hole transport layer (HTL), which extracts electrons (holes) and blocks holes (electrons) from the absorber efficiently. Inorganic hole transport materials have extracted extensive attention due to their higher mobility and better stability. Particularly, the excellent hole selective transport property of nickel oxide (NiOx) has been highlighted by its recent application in organometallic halide PSCs, due to the favorable band alignment formed between the halide perovskite absorber and NiOx HTL. This comprehensive review summarizes the recent progress in the fabrication of NiOx films and their application in PSCs. Special attention is paid to the optoelectronic properties of NiOx films, which strongly depend on the synthesis methods and post‐treatment conditions, as well as the resulting photovoltaic device performance. Surface modification and doping strategies that are used to improve the optoelectronic properties of NiOx films and the resulting device performance are discussed with emphasis. Finally, a short perspective of NiOx‐based PSCs is also provided.

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Perovskite-Based Solar Cells With Nickel-Oxidized Nickel Oxide Hole Transfer Layer

Cited by 26 publications

References 30 publications

Solution-Processible Crystalline NiO Nanoparticles for High-Performance Planar Perovskite Photovoltaic Cells

Solution-Processible Crystalline NiO Nanoparticles for High-Performance Planar Perovskite Photovoltaic Cells

Improved FTO/NiO_x Interfaces for Inverted Planar Triple-Cation Perovskite Solar Cells

Nickel Oxide as Efficient Hole Transport Materials for Perovskite Solar Cells

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Perovskite-Based Solar Cells With Nickel-Oxidized Nickel Oxide Hole Transfer Layer

Cited by 26 publications

References 30 publications

Solution-Processible Crystalline NiO Nanoparticles for High-Performance Planar Perovskite Photovoltaic Cells

Solution-Processible Crystalline NiO Nanoparticles for High-Performance Planar Perovskite Photovoltaic Cells

Improved FTO/NiOx Interfaces for Inverted Planar Triple-Cation Perovskite Solar Cells

Nickel Oxide as Efficient Hole Transport Materials for Perovskite Solar Cells

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Improved FTO/NiO_x Interfaces for Inverted Planar Triple-Cation Perovskite Solar Cells