Air-assisted flow and two-step spin-coating for highly efficient CH3NH3PbI3 perovskite solar cells

Eze, Vincent Obiozo; Lei, Binglong; Mori, Toshiyuki

doi:10.7567/jjap.55.02bf08

Cited by 34 publications

(28 citation statements)

References 31 publications

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“…The cells based on pure MAPbI 3 here also demonstrated very low performances (nearly ohmic as well, see Figure S2). It should be mentioned that the good performances presented in literature with pure MAPbI 3 either result from a "two steps" process [66] or from very different architectures [67][68][69]. In addition, a short window of a few minutes was here available on all our AZO-based devices for annealing optimization before perovskite deconversion, giving rapid performances degradation.…”

Section: Resultsmentioning

confidence: 99%

Influence of Chloride/Iodide Ratio in MAPbI3-xClx Perovskite Solar Devices: Case of Low Temperature Processable AZO Sub-Layer

et al. 2020

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A significant current challenge for perovskite solar technology is succeeding in designing devices all by low temperature processes. This could help for both rigid devices industrialisation and flexible devices development. The depositions of nanoparticles from colloidal suspensions consequently emerge as attractive approaches, especially due to their potential for low temperature curing not only for the photoactive perovskite layer but also for charge transporting layers. Here, NIP solar cells based on aluminium doped zinc oxide (AZO) electron transport layer were fabricated using a low temperature compatible process for AZO deposition. For the extensively studied perovskites based on methylammonium lead halides (MAPbI3-xClx), the chloride/iodide equation is widely proposed to follow an optimal value corresponding to an introduced MAI:PbCl2 ratio of 3:1. However, the perovskite formulation should be considered as a key parameter for the optimization of power conversion efficiency when exploring new perovskite sub-layers. We here propose a systematic method for the structural determination of the optimal ratio. It may depend on the sublayer and results from structural changes around the optimal value. The functional properties gradually increase with the addition of chlorine as long as it remains intercalated in a single phase. Above the optimal ratio, the appearance of two phases degrades the system.

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Section: Resultsmentioning

confidence: 99%

Influence of Chloride/Iodide Ratio in MAPbI3-xClx Perovskite Solar Devices: Case of Low Temperature Processable AZO Sub-Layer

et al. 2020

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“…The cleaned FTO substrates were dried at 100 C for 60 min. After drying, 50 nm thick, transparent and compact TiO2 (c-TiO2) layer was deposited using the 1.5 ml solution of titanium (IV) isopropoxide in 10 ml ethanol and 0.1 ml hydrochloric acid using spin coating method at 4000 rpm for 45 s. The films were dried at 125 °C for 15 min and then annealed at 500 °C for 30 min [7].…”

Section: Device Fabricationmentioning

confidence: 99%

A New Approach for One-step Synthesis of Perovskite:fullerene Bulk Heterojunction Using Surfactant Free Microemulsion in Slot Die Method

Tarkas¹,

Tak²,

Deo³

et al. 2020

J. Nano- Electron. Phys.

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Organometallic halide perovskite based solar cells are considered as the foundation of future photovoltaic technology. In these types of solar cells, it has been emphasized that the bulk heterojunction active layer architecture may show superior performance than the bilayer active layer architecture due to the increase in the interfacial area by intermixing both donor and acceptor phases in the bulk heterojunction. Organometallic halide perovskite with suitable acceptor in bulk heterojunction architecture can be a promising active layer in perovskite solar cells. Conventionally, the perovskite and acceptor are mixed together in a single solvent before thin film formation. Though this offers a one-step synthesis way, limited solubility of perovskite and acceptor in single solvent puts major constraint on the formation of bulk heterojunction through one-step solution processable method. This paper describes a new way of one-step synthesis of bulk heterojunction using surfactant free microemulsion in slot die method, which removes the constraint of limited solubility of the two phases in a single solvent. Emulsion of DMSO (solvent for CH3NH3PbI3) and cyclohexane (solvent for PCBM) stabilized with acetone was used for making perovskite:fullerene bulk heterojunction. Solvent evaporation dynamics has been simulated to get deeper understanding of emulsion solidification leading to bulk heterojunction formation. Structural and optical studies support the formation of bulk heterojunction for efficient charge separation at donor:acceptor interfaces. A perovskite solar cell employing this bulk heterojunction has also been reported.

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“…For example, Shi and coworkers follow the application of PbI 2 with a dipping method of MAI to form the perovskite crystal [29]. Eze et al follow the PbI 2 with a spin-coating of a MAI solution [28]. Interestingly, Yella et al followed the PbI 2 application by a 1-2-second dip of 2-propanol [40].…”

Section: Sem Images Show Roughly Similar Crystal Grain Sizes In Figurmentioning

confidence: 99%

Effects of Solution-Based Fabrication Conditions on Morphology of Lead Halide Perovskite Thin Film Solar Cells

Barnett

Cherrette

Hutcherson

et al. 2016

Advances in Materials Science and Engineering

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We present a critical review of the effects of processing conditions on the morphology of methylammonium lead iodide (CH3NH3PbI3) perovskite solar cells. Though difficult to decouple from synthetic and film formation effects, a single morphological feature, specifically grain size, has been evidently linked to the photovoltaic performance of this class of solar cells. Herein, we discuss experimental aspects of optimizing the (a) temperature and time of annealing, (b) spin-coating parameters, and (c) solution temperature of methylammonium iodide (MAI) solution.

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Air-assisted flow and two-step spin-coating for highly efficient CH₃NH₃PbI₃ perovskite solar cells

Cited by 34 publications

References 31 publications

Influence of Chloride/Iodide Ratio in MAPbI3-xClx Perovskite Solar Devices: Case of Low Temperature Processable AZO Sub-Layer

Influence of Chloride/Iodide Ratio in MAPbI3-xClx Perovskite Solar Devices: Case of Low Temperature Processable AZO Sub-Layer

A New Approach for One-step Synthesis of Perovskite:fullerene Bulk Heterojunction Using Surfactant Free Microemulsion in Slot Die Method

Effects of Solution-Based Fabrication Conditions on Morphology of Lead Halide Perovskite Thin Film Solar Cells

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