• 제목/요약/키워드: Perovskite Solar Cell

검색결과 65건 처리시간 0.031초

SCAPS-1D 시뮬레이션을 이용한 n-i-p 구조 페로브스카이트 태양전지의 열적 열화 원인 분석 (Numerical Analysis on Thermal-Induced Degradation of n-i-p Structure Perovskite Solar Cells Using SCAPS-1D)

  • 김성탁;배수현;정영훈;한동운;김동환;모찬빈
    • Current Photovoltaic Research
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    • 제10권1호
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    • pp.16-22
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    • 2022
  • The long-term stability of PSCs against visual and UV light, moisture, electrical bias and high temperature is an important issue for commercialization. In particular, since the operation temperature of solar cell can rise above 85℃, a study on thermal stability is required. In this study, the cause of thermal-induced degradation of PSCs was investigated using the SCAPS-1D simulation tool. First, PSCs of TiO2/CH3NH3PbI3/Spiro-OMeTAD/Au structure were exposed to a constant temperature of 85℃ to observe changes in conversion efficiency and quantum efficiency. Because the EQE reduction above 500 nm was remarkable, we simulated PSCs performance as a function of lifetime, doping density of perovskite and spiro-OMeTAD. Consequently, the main cause of thermal-induced degradation is considered to be the change in the perovskite doping concentration and lifetime due to ion migration of perovskite.

Enhanced Photovoltaic Performance of Perovskite Solar Cells by Copper Chloride (CuCl2) as an Additive in Single Solvent Perovskite Precursor

  • Kayesh, Md. Emrul;Matsuishi, Kiyoto;Chowdhury, Towhid H.;Kaneko, Ryuji;Noda, Takeshi;Islam, Ashraful
    • Electronic Materials Letters
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    • 제14권6호
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    • pp.712-717
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    • 2018
  • In this letter, we have introduced copper chloride ($CuCl_2$) as an additive in the $CH_3NH_3PbI_3$ precursor solution to improve the surface morphology and crystallinity of $CH_3NH_3PbI_3$ films in a single solvent system. Our optimized perovskite solar cells (PSCs) with 2.5 mol% $CuCl_2$ additive showed best power conversion efficiency (PCE) of 15.22%. The PCE of the PSCs fabricated by $CuCl_2$ (2.5 mol%) additive engineering was 56% higher than the PSC fabricated with pristine $CH_3NH_3PbI_3$.

Au/Ag 이중층 전극 구조를 이용한 페로브스카이트 태양전지 (Au/Ag Bilayer Electrode for Perovskite Solar Cells)

  • 이준영;조성진
    • 한국재료학회지
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    • 제32권1호
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    • pp.51-55
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    • 2022
  • Generally, Au electrodes are the preferred top metal electrodes in most perovskite solar cells (PSCs) because of their appropriate work function for hole transportation and their resistance to metal-halide formation. However, for the commercialization of PSCs, the development of alternative metal electrodes for Au is essential to decrease their fabrication cost. Ag electrodes are considered one of the most suitable alternatives for Au electrodes because they are relatively cheaper and can provide the necessary stability for oxidation. However, Ag electrodes require an aging-induced recovery process and react with halides from perovskite layers. Herein, we propose a bilayer Au/Ag electrode to overcome the limitations of single Au and Ag metal electrodes. The performance of PSCs based on bilayer electrodes is comparable to that of PSCs with Au electrodes. Furthermore, by using the bilayer electrode, we can eliminate the aging process, normally an essential process for Ag electrodes. This study not only demonstrates an effective method to substitute for expensive Au electrodes but also provides a possibility to overcome the limitations of Ag electrodes.

RF-마그네트론 스퍼터링으로 증착된 산화주석 전자수송층의 광학적 및 전기적 특성에 대한 증착 전력의 영향 (Effect of Sputtering Power on Optical and Electrical Properties of SnOx Electron Transport Layer Deposited by RF-magnetron Sputtering)

  • 황지성;이원규;황재근;이상원;현지연;이솔희;정석현;강윤묵;김동환;이해석
    • Current Photovoltaic Research
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    • 제9권1호
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    • pp.1-5
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    • 2021
  • The properties of the electron transport layer (ETL) have a great effect on perovskite solar cell performance. Depositing conformal SnO2 ETL on bottom textured silicon cells is essential to increase current density in terms of the silicon-perovskite tandem solar cells. In the recent study, the SnO2 electron transport layer deposited by the sputtering method showed an efficiency of 19.8%. Also, an electron transport layer with a sputtered TiO2 electron transport layer in a 4-terminal tandem solar cell has been reported. In this study, we synthesized SnOx ETL with a various sputtering power range of 30-60W by Radio-frequency (RF)-magnetron sputtering. The properties of SnOx thin film were characterized using ellipsometer, UV-vis spectrometer, and IV measurement. With a sputtering power of 50W, the solar cell showed the highest efficiency of 13.3%, because of the highest fill factor by the conductivity of SnOx film.

전단코팅 공정으로 제조하는 금속-할라이드계 페로브스카이트의 박막성장에 미치는 공정변수의 영향 고찰 (The Influence of Process Variables on the Thin Film Growth of Metal-Halide Perovskites by the Solution Shear Coating)

  • 최지혜;송지호;정지영;정중희;김재균;홍기하
    • 한국표면공학회지
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    • 제52권1호
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    • pp.6-15
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    • 2019
  • Metal-halide perovskite (MHP) solar cell is a promising candidate for next-generation flexible devices and the BIPV (Building-integrated photovoltaics) because it can exhibit high power conversion efficiencies over 23%, good bendability and low processing cost. However, MHP solar cells are commonly fabricated by the spin coating that is not a reliable method to produce large-scale commercial solar cells. A shear coating can be one of the potential candidates for the large-scale deposition method of MHP films. In this work, the influences of the process parameters such as solvents of precursor solution, substrate temperature, concentrations of precursor solution, and annealing time on the thin film growth of MHP were investigated for the shear coating process. This study presents the possibility of the shear coating process for large-scaled perovskite film fabrication and reveals the role of process condition in the thin film growth of perovskites.

구리 이온 도핑된 카드뮴 셀레나이드 양자점 전자수송층을 갖는 나노와이어 광전변환소자의 효율 평가 (Enhancing the Efficiency of Core/Shell Nanowire with Cu-Doped CdSe Quantum Dots Arrays as Electron Transport Layer)

  • 이종환;황성원
    • 반도체디스플레이기술학회지
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    • 제19권4호
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    • pp.94-98
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    • 2020
  • The core/shell of nanowires (NWs) with Cu-doped CdSe quantum dots were fabricated as an electron transport layer (ETL) for perovskite solar cells, based on ZnO/TiO2 arrays. We presented CdSe with Cu2+ dopants that were synthesized by a colloidal process. An improvement of the recombination barrier, due to shell supplementation with Cu-doped CdSe quantum dots. The enhanced cell steady state was attributable to TiO2 with Cu-doped CdSe QD supplementation. The mechanism of the recombination and electron transport in the perovskite solar cells becoming the basis of ZnO/TiO2 arrays was investigated to represent the merit of core/shell as an electron transport layer in effective devices.

TiO2:TiCl4 전자수송층을 도입한 페로브스카이트 태양전지의 광전변환효율 향상 (Improved Photoelectric Conversion Efficiency of Perovskite Solar Cells with TiO2:TiCl4 Electron Transfer Layer)

  • 안준섭;강승구;송재관;김진봉;한은미
    • 마이크로전자및패키징학회지
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    • 제24권4호
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    • pp.85-90
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    • 2017
  • 페로브스카이트 태양전지의 전자수송층(ETL)인 다공성 $TiO_2$$TiCl_4$를 흡착시켜 FTO 전극과 광활성층의 직접 접촉을 방지하고, 페로브스카이트 광활성층과 $TiO_2:TiCl_4$ 전자수송층 간의 전자 이동을 쉽게 함으로써 소자의 광전변환 효율을 높이고자 했다. 제작한 페로브스카이트 태양전지의 구조는 FTO/$TiO_2:TiCl_4$/Perovskite($CH_3NH_3PbI_3$)/spiro-OMeTAD/Ag이다. $TiCl_4$ 수용액에 다공성 $TiO_2$를 침지하는 시간을 변화시켜 제작한 소자의 광전기적 특성에 미치는 영향을 비교 평가하였다. $TiO_2:TiCl_4$ 전자수송층을 갖는 페로브스카이트 태양전지의 광전변환효율은 $TiCl_4$ 수용액에 $TiO_2$ 전자수송층을 30분 동안 침지하여 제작한 소자에서 가장 높은 10.46%를 얻었으며, 이는 $TiO_2$만의 전자수송층을 갖는 소자에 비해 27% 향상되었다. SEM, EDS, XPS 측정으로 $TiCl_4$ 흡착으로 인한 $TiO_2$ 층의 다공성 감소와 Cl 성분의 검출, 페로브스카이트 광활성층의 큐브형 모폴로지와 $PbI_2$ 피크의 이동을 관찰하였으며, $TiO_2:TiCl_4$ 층과 페로브스카이트 광활성층이 형성되었음을 확인하였다.

원자층 증착법과 용액 공정법으로 성장한 전자 수송층 산화주석 박막의 페로브스카이트 태양전지 특성 (Characteristics of Tin Oxide Thin Film Grown by Atomic Layer Deposition and Spin Coating Process as Electron Transport Layer for Perovskite Solar Cells)

  • 김기현;정성진;양태열;임종철;장효식
    • 한국재료학회지
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    • 제33권11호
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    • pp.475-481
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    • 2023
  • Recently, the electron transport layer (ETL) has become one of the key components for high-performance perovskite solar cell (PSC). This study is motivated by the nonreproducible performance of ETL made of spin coated SnO2 applied to a PSC. We made a comparative study between tin oxide deposited by atomic layer deposition (ALD) or spin coating to be used as an ETL in N-I-P PSC. 15 nm-thick Tin oxide thin films were deposited by ALD using tetrakisdimethylanmiotin (TDMASn) and using reactant ozone at 120 ℃. PSC using ALD SnO2 as ETL showed a maximum efficiency of 18.97 %, and PSC using spin coated SnO2 showed a maximum efficiency of 18.46 %. This is because the short circuit current (Jsc) of PSC using the ALD SnO2 layer was 0.75 mA/cm2 higher than that of the spin coated SnO2. This result can be attributed to the fact that the electron transfer distance from the perovskite is constant due to the thickness uniformity of ALD SnO2. Therefore ALD SnO2 is a candidate as a ETL for use in PSC vacuum deposition.

유기 금속 할라이드 페로브스카이트에 기반한 태양광 물분해 (Solar Water Splitting Based on Organic Metal Halide Perovskites)

  • 오일환
    • 전기화학회지
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    • 제20권1호
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    • pp.18-25
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    • 2017
  • 본 총설에서는 최근 전세계적으로 각광 받고 있는 유기 금속 할라이드 페로브스카이트 소재에 기반한 태양광 물분해 연구에 대해 정리하였다. 크게, 현재까지 연구보고들을 태양전지-전기분해기 구성 (photovoltaic-electrolyzer configuration) 및 통합 태양광 물분해 (integrated photoelectrolysis)로 분류하여 최근 연구결과들을 소개하였다. 해당 분야 연구는 아직 초기 단계에 있으며, 향후 효과적인 보호막 개발, 고전압 텐덤전지 제작 등이 필요함을 보였다.

페로브스카이트 할로겐화물 박막의 발광 측정 조건에 따른 특성 분석 (Photoluminescence Characterization of Halide Perovskite Films according to Measuring Conditions)

  • 조현아;이승민;노준홍
    • 한국재료학회지
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    • 제32권10호
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    • pp.419-424
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    • 2022
  • Halide perovskite solar cells (PSCs) have improved rapidly over the past few years, and research on the optoelectrical properties of halide perovskite thin films has grown as well. Among the characterization techniques, photoluminescence (PL), a method of collecting emitted photons to evaluate the properties of materials, is widely applied to evaluate improvements in the performance of PSCs. However, since only photons emitted from the film in the escape cone are included, the photons collected in PL are a small fraction of the total photons emitted from the film. Unlike PSCs power conversion efficiency, PL measuring methods have not been standardized, and have been evaluated in a variety of ways. Thus, an in-depth study is needed of the methods used to evaluate materials using PL spectra. In this study, we examined the PL spectra of the perovskite light harvesting layer with different measurement protocols and analyzed the features. As the incident angle changed, different spectra were observed, indicating that the PL emission spectrum can depend on the measuring method, not the material. We found the intensity and energy of the PL spectra changes were due to the path of the emitted photons. Also, we found that the PL of halide perovskite thin films generally contains limited information. To solve this problem, the emitted photons should be collected using an integrating sphere. The results of this study suggest that the emission spectrum of halide perovskite films should be carefully interpreted in accordance with PL measuring method, since PL data is mostly affected by the method.