Facile Solution Spin-Coating SnO2 Thin Film Covering Cracks of TiO2 Hole Blocking Layer for Perovskite Solar Cells

Ren, Haiyan; Zou, Xiaoping; Cheng, Jin; Ling, Tao; Bai, Xiaojun; Chen, Dan

doi:10.3390/coatings8090314

Cited by 22 publications

(12 citation statements)

References 34 publications

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“…However, the film is spin-coated on a rough FTO substrate, leading to uneven thickness, pinholes, and incomplete surface coverage of the TiO 2 layer. This will result in contact between the perovskite light-absorption layer and the FTO substrate, resulting in the recombination of electrons and holes at the interface [31].…”

Section: Introductionmentioning

confidence: 99%

Effect of Optimization of TiO2 Electron Transport Layer on Performance of Perovskite Solar Cells with Rough FTO Substrates

et al. 2020

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The film quality of the electron transport layer (ETL) plays an important role in improving the performance of perovskite solar cells (PSCs). In order to reduce the effect of rough fluorine-doped SnO2 (FTO)substrate on the film quality of the TiO2 ETL, multiple cycles of spin-coating were employed to realize optimized TiO2 film and improve the performance of PSCs with rough FTO. The results show that TiO2 ETL was optimized most effectively using two spin-coating cycles, obtaining the best performance of PSCs with rough FTO. The carbon electrode-based PSCs were then demonstrated. Our work discusses the feasibility of low-quality rough FTO for the fabrication of PSCs and photodetectors to reduce costs.

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Section: Introductionmentioning

confidence: 99%

Effect of Optimization of TiO2 Electron Transport Layer on Performance of Perovskite Solar Cells with Rough FTO Substrates

et al. 2020

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“…Commercial 2,2 ,7,7 -tetrakis-(N,N-dip-methoxyphenylamine)-9,9 -spirobifluorene solution (Spiro-OMeTAD, Cas No. 207739-72-8, yellow powder in appearance, purity ≥99.5%) was purchased from Xi'an Polymer Light Technology Corp. (Xi'an, China) [16,17].…”

Section: Methodsmentioning

confidence: 99%

Impact of Delay Time before Annealing MAI-PbI2-DMSO Intermediate Phase on Perovskite Film Quality and Photo-Physical Properties

et al. 2019

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High-performance perovskite solar cells are strongly dependent on the quality of the perovskite layer. Two-step sequential deposition of CH 3 NH 3 PbI 3 (MAPbI 3 ) films is widely used to fabricate perovskite solar cells and many factors influence the quality of perovskite films, such as the delay time before annealing the MAI-PbI 2 -DMSO intermediate phase, which would impact the morphology and photo-physical properties of perovskite thin films. Here, the experimental research indicates that the impact of the delay time before annealing the MAI-PbI 2 -DMSO intermediate phase on the quality, crystallinity, and photo-physical properties of perovskite film is crucial. During the delay process, the delay time before annealing the MAI-PbI 2 -DMSO intermediate phase plays an important role in the nucleation process of perovskite grains inside the intermediate phase. With the extension of the delay time before annealing, the quality of the perovskite film deteriorates, thus the photo-physical properties change. We found that after the localized liquid-liquid diffusion of MAI and PbI 2 , with the extension of the delay time before annealing the MAI-PbI 2 -DMSO intermediate phase, the nucleation number of the perovskite grains increases and the grain size becomes smaller. Therefore, with the extension of the delay time before annealing, the device performance deteriorates.

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“…10101-63-0, yellow crystalline powder in appearance, purity >99.99%), 18NR-T TiO 2 paste (mp-TiO 2 ), acidic titanium dioxide solution (bl-TiO 2 ), methyl ammonium iodide (CH 3 NH 3 I, MAI, Cas No.14965-49-2, white powder in appearance, purity 99.5%), Isopropyl alcohol (IPA), Commercial 2,2 ,7,7 tetrakis-(N,N-dip-methoxyphenylamine)9,9 spirobifluorene solution (Spiro-OMeTAD, Cas No. 207739-72-8, yellow powder in appearance, purity 99.5%), and KI were purchased from Xi'an Polymer Light Technology Corp (Xi'an, China) [12,13].…”

Section: Methodsmentioning

confidence: 99%

Impact of K+ Doping on Modulating Majority Charge Carrier Type and Quality of Perovskite Thin Films by Two-step Solution Method for Solar Cells

et al. 2019

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Traditional hetero-junction perovskite solar cells are composed of light-absorbing layers, charge carrier-transporting layers, and electrodes. Recently, a few papers on homo-junction perovskite solar cells have been studied. Here, we studied the effect of K+ doping on TiO2/PbI2 interface quality, perovskite film morphology, photo-physical properties, and majority carrier type. In particular, the K+ extrinsic doping can modulate the majority carrier type of the perovskite thin film. The study indicated that the interface between the perovskite layer and the TiO2 layer deteriorates with the increase of K+ doping concentration, affecting the electron transport ability from the perovskite film to the TiO2 layer and the photo-physical properties of the perovskite layer by K+ doping. In addition, the majority charge carrier type of perovskite thin films can be changed from n-type to p-type after K+ extrinsic doping, and the corresponding hole concentration increased to 1012 cm−3. This approach of modulating the majority charge carrier type of perovskite thin film will pave the way for the investigation of perovskite homo-junction by extrinsic doping for solar cells.

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Facile Solution Spin-Coating SnO2 Thin Film Covering Cracks of TiO2 Hole Blocking Layer for Perovskite Solar Cells

Cited by 22 publications

References 34 publications

Effect of Optimization of TiO2 Electron Transport Layer on Performance of Perovskite Solar Cells with Rough FTO Substrates

Effect of Optimization of TiO2 Electron Transport Layer on Performance of Perovskite Solar Cells with Rough FTO Substrates

Impact of Delay Time before Annealing MAI-PbI2-DMSO Intermediate Phase on Perovskite Film Quality and Photo-Physical Properties

Impact of K+ Doping on Modulating Majority Charge Carrier Type and Quality of Perovskite Thin Films by Two-step Solution Method for Solar Cells

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