A large grain size perovskite thin film with a dense structure for planar heterojunction solar cells via spray deposition under ambient conditions

Liang, Zhurong; Zhang, Shaohong; Xu, Xueqing; Wang, Nan; Wang, Junxia; Wang, Xin; Bi, Zhongnan; Xu, Gang; Yuan, Ningyi; Ding, Jianning

doi:10.1039/c5ra09110a

Cited by 145 publications

(105 citation statements)

References 31 publications

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“…[33] After that, several recent reports furthero utlined new opportunities for spray technology in the field of perovskite solar cells. [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] The goal to achieveprintable perovskite solar cells by using spray-coating can be justifiedb y the processability of depositing solutions and post-processing treatment in as imple and low-cost way.G iven that spray-deposition has great potential for continuous processes, af undamental investigation on how the aforementionedk ey factors affect the quality and the performance of solution-processed perovskite thin-films used in solar cells is necessary.…”

Section: Spray-coating Techniques Include Severals Teps Of Atomizationmentioning

confidence: 99%

Controlled Deposition and Performance Optimization of Perovskite Solar Cells Using Ultrasonic Spray‐Coating of Photoactive Layers

et al. 2017

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This study investigated a new film-deposition technique, ultrasonic spray-coating, for use in the production of a photoactive layer of perovskite solar cells. Stable atomization and facile fabrication of perovskite thin films by ultrasonic spray-coating were achieved in a one-step method through manipulating the ink formulation (e.g., solution concentration, precursor composition, and mixing solvent ratio) and the drying kinetics (e.g., post-annealing temperature). The performance of the perovskite solar cells was mainly influenced by the intrinsic film morphology and crystalline orientation of the deposited perovskite layer. By suitable optimization of the spreading and drying conditions of the ink, ultrasonic spray-coated perovskite photovoltaic devices were obtained with a maximum power conversion efficiency of 11.30 %, a fill factor of 73.6 %, a short-circuit current of 19.7 mA cm , and an open-circuit voltage of 0.78 V, respectively. Notably, the average power efficiency reached above 10 %, attributed to the large flower-like perovskite crystal with orientation along the (1 1 2)/(2 0 0) and (2 2 4)/(4 0 0) directions. Thus, the ultrasonic spray-coating method for perovskite photoactive layers, combining advantages of good photovoltaic performance results and benefits from cost and processing, has the potential for large-scale commercial production.

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Section: Spray-coating Techniques Include Severals Teps Of Atomizationmentioning

confidence: 99%

Controlled Deposition and Performance Optimization of Perovskite Solar Cells Using Ultrasonic Spray‐Coating of Photoactive Layers

et al. 2017

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“…20 On the contrary, other reports stated that rough surface with large grain size of perovskite film is a sign to high light harvesting efficiency, which can reduce charge recombination. 21 In order to find a correlation between short-circuit photocurrent and the morphology of CH 3 NH 3 SnI 3 perovskite, local photocurrent mapping of CH 3 NH 3 SnI 3 film using CS-AFM was performed. Local photocurrent mapping of CH 3 NH 3 SnI 3 /TiO 2 /FTO/glass heterojunction structures made from DMF and DMSO-GBL are shown in Figures 6(a) and 6(b), respectively.…”

Section: -8mentioning

confidence: 99%

Lead free CH3NH3SnI3 perovskite thin-film with p-type semiconducting nature and metal-like conductivity

et al. 2016

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Lead free CH3NH3SnI3 perovskite thin film was prepared by low temperature solution processing and characterized using current sensing atomic force microscopy (CS-AFM). Analysis of electrical, optical, and optoelectrical properties reveals unique p-type semiconducting nature and metal like conductivity of this material. CH3NH3SnI3 film also showed a strong absorption in visible and near infrared spectrum with absorption onset of 1.3 eV. X-ray Diffraction analysis and scanning electron microscopy (SEM) confirmed a structure of this compound and uniform film formation. The morphology, film uniformity, light harvesting and electrical properties strongly depend on preparation method and precursor solution. CH3NH3SnI3 films prepared based on dimethylformamide (DMF) showed higher crystallinity and light harvesting capability compared to the film based on combination of dimethyl sulfoxide (DMSO) with gamma-butyrolactone (GBL). Local photocurrent mapping analysis showed that CH3NH3SnI3 can be used as an active layer and have a potential to fabricate lead free photovoltaic devices.

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“…[9] Perovskite thin films can be prepared by several methods, such as one- [3,10,11] and two-step spin-coating, [12] coevaporation, [4] avapor-assisted solution process (VASP), [13] hybrid chemical vapor deposition, [14][15][16] vacuum sequential deposition, [17] and spray deposition. [18,19] Although perovskite deposition by the spin-coating methodi sv ery simple, the control of uniformity and surface film morphology is difficult. The high reaction rate, presence of solvent, and dissolution of perovskite film results in incomplete coverage, which leads to shunting paths and loss of conversion efficiency in the solar cells.…”

Section: Introductionmentioning

confidence: 99%

Mixed‐Halide CH₃NH₃PbI_3−xX_x (X=Cl, Br, I) Perovskites: Vapor‐Assisted Solution Deposition and Application as Solar Cell Absorbers

et al. 2016

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There have been recent reports on the formation of single-halide perovskites, CH3 NH3 PbX3 (X=Cl, Br, I), by means of vapor-assisted solution processing. Herein, the successful formation of mixed-halide perovskites (CH3 NH3 PbI3-x Xx ) by means of a vapor-assisted solution method at ambient atmosphere is reported. The perovskite films are synthesized by exposing PbI2 film to CH3 NH3 X (X=I, Br, or Cl) vapor. The prepared perovskite films have uniform surfaces with good coverage, as confirmed by SEM images. The inclusion of chlorine and bromine into the structure leads to a lower temperature and shorter reaction time for optimum perovskite film formation. In the case of CH3 NH3 PbI3-x Clx , the optimum reaction temperature is reduced to 100 °C, and the resulting phases are CH3 NH3 PbI3 (with trace Cl) and CH3 NH3 PbCl3 with a ratio of about 2:1. In the case of CH3 NH3 PbI3-x Brx , single-phase CH3 NH3 PbI2 Br is formed in a considerably shorter reaction time than that of CH3 NH3 PbI3 . The mesostructured perovskite solar cells based on CH3 NH3 PbI3 films show the best optimal power conversion efficiency of 13.5 %, whereas for CH3 NH3 PbI3-x Clx and CH3 NH3 PbI3-x Brx the best recorded efficiencies are 11.6 and 10.5 %, respectively.

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A large grain size perovskite thin film with a dense structure for planar heterojunction solar cells via spray deposition under ambient conditions

Abstract: A facile spray deposition process was developed to prepare high-quality perovskite films with full surface coverage and large grain size.

Cited by 145 publications

References 31 publications

Controlled Deposition and Performance Optimization of Perovskite Solar Cells Using Ultrasonic Spray‐Coating of Photoactive Layers

Controlled Deposition and Performance Optimization of Perovskite Solar Cells Using Ultrasonic Spray‐Coating of Photoactive Layers

Lead free CH3NH3SnI3 perovskite thin-film with p-type semiconducting nature and metal-like conductivity

Mixed‐Halide CH₃NH₃PbI_3−xX_x (X=Cl, Br, I) Perovskites: Vapor‐Assisted Solution Deposition and Application as Solar Cell Absorbers

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A large grain size perovskite thin film with a dense structure for planar heterojunction solar cells via spray deposition under ambient conditions

Abstract: A facile spray deposition process was developed to prepare high-quality perovskite films with full surface coverage and large grain size.

Cited by 145 publications

References 31 publications

Controlled Deposition and Performance Optimization of Perovskite Solar Cells Using Ultrasonic Spray‐Coating of Photoactive Layers

Controlled Deposition and Performance Optimization of Perovskite Solar Cells Using Ultrasonic Spray‐Coating of Photoactive Layers

Lead free CH3NH3SnI3 perovskite thin-film with p-type semiconducting nature and metal-like conductivity

Mixed‐Halide CH3NH3PbI3−xXx (X=Cl, Br, I) Perovskites: Vapor‐Assisted Solution Deposition and Application as Solar Cell Absorbers

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Mixed‐Halide CH₃NH₃PbI_3−xX_x (X=Cl, Br, I) Perovskites: Vapor‐Assisted Solution Deposition and Application as Solar Cell Absorbers