• Title/Summary/Keyword: Perovskite Solar Cell

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Comparison Study of Compact Titanium Oxide (c-TiO2) Powder Electron Transport Layer Fabrication for Carbon Electrode-based Perovskite Solar Cells (탄소전극 기반 페로브스카이트 태양전지 적용을 위한 조밀 이산화티타늄 분말 전자수송층 제작 비교 연구)

  • Woo, Chae Young;Lee, Hyung Woo
    • Journal of Powder Materials
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    • v.29 no.4
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    • pp.297-302
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    • 2022
  • This study compares the characteristics of a compact TiO2 (c-TiO2) powdery film, which is used as the electron transport layer (ETL) of perovskite solar cells, based on the manufacturing method. Additionally, its efficiency is measured by applying it to a carbon electrode solar cell. Spin-coating and spray methods are compared, and spray-based c-TiO2 exhibits superior optical properties. Furthermore, surface analysis by scanning electron microscopy (SEM) and atomic force microscopy (AFM) exhibits the excellent surface properties of spray-based TiO2. The photoelectric conversion efficiency (PCE) is 14.31% when applied to planar perovskite solar cells based on metal electrodes. Finally, carbon nanotube (CNT) film electrode-based solar cells exhibits a 76% PCE compared with that of metal electrode-based solar cells, providing the possibility of commercialization.

Technological Progress Towards Commercialization of Organometal Halide Perovskite Solar Cells (유기금속 할라이드 페로브스카이트 태양전지의 상용화를 위한 기술의 진전)

  • Pyun, Sun Ho
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.27 no.12
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    • pp.776-791
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    • 2014
  • A marvellous solar cell technology system based on organometal halide perovskites has recently shown an unprecedented progress in power conversion efficiency (PCE); the certified one of 17.9% and unconfirmed of 19.3%, as well as the estimated electricity with a generating cost lower than the half of conventional methods based on fossil fuels. In this report the present status of stability with regards to moisture, ambient temperature, ultraviolet and lead toxicity as well as the key technological developments for the early commercialization are covered. Comprehensive understanding of material science for perovskites is required, together with complete encapsulation technologies beyond those for OLEDs, in order to ensure a 20-year-longer-than lifetime of PSCs (perovskite solar cells) and the stability according to the IEC 61646 damp heat test standard, which will result in the replacement of silicon solar cells with PSCs.

Effect of UVO Treatment on Optical and Electrical Properties of NiOx Thin Film and Perovskite Solar Cells (UVO 처리에 따른 NiOx 박막 및 페로브스카이트 태양전지 셀 특성 변화)

  • Sujin Cho;Jae-Keun Hwang;Dowon Pyun;Seok Hyun Jeong;Solhee Lee;Wonkyu Lee;Ji-Seong Hwang;Youngho Choe;Donghwan Kim
    • Current Photovoltaic Research
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    • v.12 no.1
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    • pp.1-5
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    • 2024
  • Perovskite solar cells have exhibited a remarkable increase in efficiency from an initial 3.8% to 26.1%, marking a significant advancement. However, challenges persist in the commercialization of perovskite solar cells due to their low stability with respect to humidity, light exposure, and temperature. Moreover, the instability of the organic charge transport layer underscores the need for exploring inorganic alternatives. In the manufacturing process of the perovskite solar cells' oxide charge transport layer, ultraviolet-ozone (UVO) treatment is commonly applied to enhance the wettability of the perovskite solution. The UVO treatment on metal oxides has proven effective in suppressing surface oxygen vacancies and removing surface organic contaminants. This study focused on the characterization of nickel oxide as the hole transport material in perovskite solar cells, specifically investigating the impact of UVO treatment on film properties. Through this analysis, changes induced by the UVO treatment were observed, and consequent alterations in the device characteristics were identified.

New Generation Multijunction Solar Cells for Achieving High Efficiencies

  • Lee, Sunhwa;Park, Jinjoo;Kim, Youngkuk;Kim, Sangho;Iftiquar, S.M.;Yi, Junsin
    • Current Photovoltaic Research
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    • v.6 no.2
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    • pp.31-38
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    • 2018
  • Multijunction solar cells present a practical solution towards a better photovoltaic conversion for a wider spectral range. In this review, we compare different types of multi-ijunction solar cell. First, we introduce thin film multijunction solar cell include to the thin film silicon, III-V material and chalcopyrite material. Until now the maximum reported power conversion efficiencies (PCE) of solar cells having different component sub-cells are 14.0% (thin film silicon), 46% (III-V material), 4.4% (chalcopyrite material) respectively. We then discuss the development of multijunction solar cell in which c-Si is used as bottom sub-cell while III-V material, thin film silicon, chalcopyrite material or perovskite material is used as top sub-cells.

Evaluation of Results in Recent Flexible Solar Cell Research Trends via Network Analysis Method (네트워크 분석을 이용한 플렉시블 태양전지 최근 연구동향 분석)

  • Byun, Kisik;Lim, Jae Sung;Park, Jae Woo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.6
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    • pp.600-613
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    • 2018
  • The purpose of this research was to introduce a network analysis method for analyzing the recent trend of the flexible solar cell using a scholarly database. Based on the five years from 2013 to 2017, we used centrality analysis of research papers via measurement of degree centrality, closeness centrality, and betweenness centrality. The results of network analysis show that cell has a centrality value above 0.8, which means that cell is connected with 80% of the total keywords, so it is recognized as the center of flexible solar cell research. The analysis results also indicate that perovskite and copper indium gallium diselenide (CuInGaSe2, or CIGS) are the center of the subgroup for cell. We recognize that the result refers to recent new technology called the CIGS/perovskite tandem solar cell. We hope that the network analysis method will be the appropriate and precise tool for technology and research planning via elaboration and optimization.

Speedy Two-Step Thermal Evaporation Process for Gold Electrode in a Perovskite Solar Cell

  • Kim, Kwangbae;Park, Taeyeul;Song, Ohsung
    • Korean Journal of Materials Research
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    • v.28 no.4
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    • pp.235-240
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    • 2018
  • We propose a speedy two-step deposit process to form an Au electrode on hole transport layer(HTL) without any damage using a general thermal evaporator in a perovskite solar cell(PSC). An Au electrode with a thickness of 70 nm was prepared with one-step and two-step processes using a general thermal evaporator with a 30 cm source-substrate distance and $6.0{\times}10^{-6}$ torr vacuum. The one-step process deposits the Au film with the desirable thickness through a source power of 60 and 100 W at a time. The two-step process deposits a 7 nm-thick buffer layer with source power of 60, 70, and 80 W, and then deposits the remaining film thickness at higher source power of 80, 90, and 100 W. The photovoltaic properties and microstructure of these PSC devices with a glass/FTO/$TiO_2$/perovskite/HTL/Au electrode were measured by a solar simulator and field emission scanning electron microscope. The one-step process showed a low depo-temperature of $88.5^{\circ}C$ with a long deposition time of 90 minutes at 60 W. It showed a high depo-temperature of $135.4^{\circ}C$ with a short deposition time of 8 minutes at 100 W. All the samples showed an ECE lower than 2.8 % due to damage on the HTL. The two-step process offered an ECE higher than 6.25 % without HTL damage through a deposition temperature lower than $88^{\circ}C$ and a short deposition time within 20 minutes in general. Therefore, the proposed two-step process is favorable to produce an Au electrode layer for the PSC device with a general thermal evaporator.

Performance enhancement of perovskite solar cells using Ag nanoparticles via aerosol technology (에어로졸 기술로 제작된 은 나노 입자를 활용한 페로브스카이트 태양전지 성능 향상 연구)

  • Sua Park;Inyong Park;Dae Hoon Park;Bangwoo Han;Gunhee Lee;Min-cheol Kim
    • Particle and aerosol research
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    • v.19 no.2
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    • pp.21-30
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    • 2023
  • Solar cells, converting abundant solar energy into electrical energy, are considered crucial for sustainable energy generation. Recent advancements focus on nanoparticle-enhanced solar cells to overcome limitations and improve efficiency. These cells offer two potential efficiency enhancements. Firstly, plasmonic effects through nanoparticles can improve optical performance by enhancing absorption. Secondly, nanoparticles can improve charge transport and reduce recombination losses, enhancing electrical performance. However, factors like nanoparticle size, placement, and solar cell structure influence the overall performance. This study evaluates the performance of silver nanoparticles incorporated in a p-i-n structure of perovskite solar cells, generated via aerosol state by the evaporation and condensation system. The silver nanoparticles deposited between the hole transport layer and transparent electrode form nanoparticle embedded transport layer (NETL). The evaluation of the optoelectronic properties of perovskite devices using NETL demonstrates their potential for improving efficiency. The findings highlight the possibility of nanoparticle incorporation in perovskite solar cells, providing insights for sustainable energy generation.

Enhancement in Open-circuit Voltage of Methylammmonium Lead Halide Perovskite Solar Cells Via Non-stoichiometric Precursor (비화학양론적 전구체 조성 조절을 통한 페로브스카이트 태양전지의 개방전압 향상)

  • Yun, Hee-Sun;Jang, Yoon Hee;Lee, Doh-Kwon
    • Current Photovoltaic Research
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    • v.6 no.1
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    • pp.12-16
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    • 2018
  • The interest in perovskite solar cells has been skyrocketed owing to their rapid progress in efficiency in recent years. Here, we report the effect of non-stoichiometry in the methylammonium lead trihalide ($MAPbI_3$) precursors used in a solution process with different MAI : $PbI_2$ ratios of 1 : 0.96, 1 : 1.10, 1 : 1.15, and 1:1.20. With an increase in the $PbI_2$ content, the $PbI_2$ secondary phase was found to form at grain boundary region of perovskite thin films, as evidenced by X-ray diffraction (XRD) and scanning electron microscopy (SEM). In terms of device performance, open-circuit voltage in particular is significantly improved with increasing the molar ratio of $PbI_2$, which is possibly ascribed to the reduction in recombination sites at grain boundary of perovskite and hence the prolonged life time of light-generated carriers according to the reported. As a result, the $PbI_2-excess$ devices exhibited a higher power conversion efficiency compared to the MAI-excess ones.

Air-Processed Efficient Perovskite Solar Cell via Antisolvent Additive Engineering (안티솔벤트 첨가제 공정에 의한 대기 중 고효율 페로브스카이트 태양전지 제작)

  • Se-Yeong Baek;Seok-Soon Kim
    • Applied Chemistry for Engineering
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    • v.35 no.2
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    • pp.128-133
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    • 2024
  • Although antisolvent-assisted crystallization is one of the promising processes to produce high-quality perovskite films, general antisolvents such as chlorobenzene (CB) have toxic and volatile properties. In addition, CB is not suitable to control the crystallization of perovskite in the atmospheric air. In this work, isopropyl acetate (IA) is used as an eco-friendly antisolvent to demonstrate air-processed perovskite solar cells, and ethyl-4-cyanocinnamate (E4CN) with a cyano group, carbonyl group, and aromatic ring is introduced in IA to improve the performance and stability of devices. Defects at the surface and grain boundaries of the perovskite layer, such as un-coordinated Pb2+ and iodine, can be decreased resulting from the interaction of E4CN and perovskite, and thus reduced recombination and enhanced carrier transport can be expected. As a result, the perovskite device with E4CN achieves a high maximum power conversion efficiency (PCE) of 18.89% and outstanding stability, maintaining 60% of the initial efficiency for 300 h in the air without any encapsulation.

Study of Inorganic CsPbI2Br Perovskite Solar Cell Using Hot-air Process (Hot-air 공정을 이용한 무기 CsPbl2Br 페로브스카이트 태양전진 제작 연구)

  • RINA, KIM;Dong-Gun, Lee;Dong-Won, Kang;Eundo, Kim;Jeha, Kim
    • Current Photovoltaic Research
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    • v.10 no.4
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    • pp.101-106
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    • 2022
  • We prepared a CsPbI2Br solution using Cesium iodide (CsI), Lead (II) bromide (PbBr2) and Lead (II) iodide (PbI2) materials into a polar solvent mixture of N,N-dimethylformamide (DMF) and Dimethyl sulfoxide (DMSO). A simple spin coating technique was used for the fabrication of CsPbI2Br absorber layer in the solution process. In order to prepare uniform coating of absorber film we adopted a hot-air process in assocation with the spin coating. It was confirmed that the thin film manufactured by the hot-air process had a higher absorption rate than that without it, and the optical band gap was measured 1.93 eV. The thin film of absorber was uniformly prepared and revealed the Black α-Cubic crystal phase as proved through X-ray diffraction analysis. Finally, a perovskite solar cell having an n-i-p structure was manufactured with a CsPbI2Br perovskite absorption layer. From the solar cell, we obtained a power conversion efficiency (PCE) of 5.97% in a forward measurement.