Quasi-2D Ruddlesden-Popper Perovskite Light-Emitters with Br-based Mixed Spacers.

이일금,임주원,전리나,( Edward H. Sargent ),김동하 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0

Recently, perovskite LED has been attracting attention as a next-generation LED that can replace existing OLED and QLED. However, methylammonium lead halide (MLH) perovskite is not applicable to LED devices due to its low moisture stability. Quasi-2D perovskites (PEA)₂(MA)_n-1PbnBr_3n+1 has been reported to enhance the photoluminescence (PL) and humid-stability compared to conventional MLH 3D perovskite. However, the development of conventional ruddlesden-popper phase perovskites has been only focused on green emission region. In this regard, herein we tried to tailor the emission range of Br-based quasi-2D perovskite from green to blue region by integrating organic cation spacer. As the candidates for spacer, aromatic and aliphatic cations were employed by controlling the relative concentration ratio. As a result, the PL intensities and the emission wavelength showed emissions at blue regions. Based on our new-class of layered perovskites, we demonstrated blue-region LED devices.

轉換社債의 會計處理와 財務的 評價에 관한 硏究

李一琴 진주여자전문대학 1993 論文集 Vol.16 No.-

In the above, this dissertation studied Accounting process and financial Evalument, convertible bond which has good advatage that mediates capital dement and Capital supply amicably is enterprise financial mathod and investment method. Convertible bend is mixed securites that was mixed stock and bond. in capital market is histerical Out put in capital supply method. For exanples We pereted that capital supply by convertible bond is filted to the enterprise that has good growth. It is very important to decid accrual time and convertible bond price in the case that the enterprise has high growth float convertible bond. At that case convertible bond price is according to the standard price of floating Points. This dissertation noticel this characte of convertible bond and actual nacessity theories. This Payer first consideraled fund mental about convertible bond. second applicated these theories to the assessmet of convertible bond. Third recongoniged that the value of convertible that endaned Convertible is very important especially. In the case high growth enterprise, and this point forth Convertible bond fixed market rate of interst and enterprise rate of growth. there fore, Capital supply by convertible bond reduce the cost of Agency that relaled to owner management duty extrinsic important and the theor basis deperd up on this. Becoase in case of that Full owner management supply the enternal quity, for maximige the utility he increase the convertible bond of duty extrinsic inportation owner management who has the enter prise that related to this in case of marketing Value price is dowve, share the cost At this point float of convertible bond reduction of Agency expence. It is desirable for owner who Speculate the real state of this enterprise to floot the convertible. bond, and for the decision of time and Convertible bond Price of convertible bond it is needful to afess the financial Evalument strictly.

財務情報의 有用性에 관한 實證的 硏究

이일금 진주여자전문대학 1994 論文集 Vol.17 No.-

活動基準原價計算에 관한 硏究

李一琴,全雄哲 진주여자전문대학 1997 論文集 Vol.20 No.-

The inadequacies of exiating cost accounting system have recently been the focus of much researches, that is. discussion on disadvantages of traditional costing systems(TCS). In this viewpoint this study reviews advatages of activity based costing(ABC) and then design and implementation of ABC. Advantages of ABC is that TCS have many failings - in particular, their inability to repore acequate cost informations for managing orgarnizations. ABC can provide a better understanding of how to reduce costs by managing the activities that cosume resources. One key to the application of ABC is a clear understanding of the physical activies represented by the structures of a particular ABC system. This study identifies design and implementation and theoretical suructures of ABC that have three elements as activities; activity centers, cost drivers, and resource categories

優先株發行에 관한 硏究

李一琴,김신조 진주여자전문대학 1996 論文集 Vol.19 No.-

In this paper, we reviewed and discussed on perferred stock and warrant, and explained for dividend system improvement. As discussed ablove, security market have a great influence on national economy. In issuing perferred stock, company have to received reliablity of the general public. This paper treated trade-off both large stockholder's point of view and investor's point of view. A future prospect of the perferred stock was also treated briefly.

資産再評價制度에 관한 硏究

李一琴 진주여자전문대학 1991 論文集 Vol.14 No.-

Modern company successively carries out its management activity under the preposition of going concern. However today's money value has kept changing and under the age of high inflation, the outstanding difference between cost and market price gave us the opportunity on revaluation of assets. In this paper, I surveyed the changing process, the effect, the point at issue and prospects of asset revaluation. In surveying of the changing process asset revaluation of Korean enterprise, we could make out the process of its act. Through the effect of asset revaluation in enterpries, I examined the accelerated effect of depreciation, the negative effect of financial frame of enterprise. The point at issue and prospects of asset revaluation are as fellows ; such as taxation of revaluation, unadmitting under revaluation cost, income accounting of transferation on revaluation asser, reconcilation of special cases, the deficit of constructual creteria, determination of scrape useful life on revaluation asset, the manipulation possibility of accounting number and voluntariness, addition issue of accounting number, etc Revaluation of asset actually raise the book value of private enterprise or corporation asset. Korean revaluation system of assets can protect the enterprise out of excessive taxation burdern and high divide excluding fictitious profit under the correct calculating depreciation cost and every enterprise improve its financial frame and maintain real capital merit, and encounter various criticism concerning the difficulties of time-lag comparison.

Fluorinated Organic-Inorganic Hybrid Polymer Gate Dielectrics for High Performance Metal Oxide Thin-Film Transistors

이일금,엽하경,김나혜,김주영,김세현,남수지 한국고분자학회 2020 한국고분자학회 학술대회 연구논문 초록집 Vol.45 No.2

Quasi-2D Ruddlesden-Popper Perovskite Light-Emitters with Br-based Mixed Spacers

이일금,임주원,( Li Na Quan ),( Edward H. Sargent ),김동하 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.1

上場企業의 轉煥社債發行과 株式轉煥에 관한 硏究

李一琴,洪永哲 진주여자전문대학 1996 論文集 Vol.19 No.-

In this paper, We reviewed and discussed on convertible bonds, and explained effects for convertible bonds. As discussed above, convertible bonds is to conver into issuing company stock by an intension of stock owner. In issuing convertible bonds, repayment and external interest rate, conversion cost and issuing condition, no connection with company size, grade credit, stock trends, are uniformly determined. To promotion non guarnteed convertible bond issuing, nonguranteed bond issuing rather than guaranteed bond are profitable to the issuing company.

교육서비스 품질의 중요도에 관한 연구 : SERVQUAL 중심으로

이일금,김종현 진주여자전문대학 2002 論文集 Vol.25 No.-

In recent, environments of educational services are becoming more complex: the potential of foreign colleges' entry, the reduction of high school students' number and the increasing competition of educational services. The changes of educational environments make it important for many colleges to recognize students' needs and the importance of educational services. The hypotheses suggested in this paper are as follows: H1: SERVQUAL dimensions are to be useful tool to measure educational services quality of colleges. H2: There will be difference between male and female college students' importance of perceptions for educational services quality. H3: There will be differences among college students' grades in the importance of perceptions for educational services quality. H4: There will be differences among college students' majors in the importance of perceptions for educational services quality. H5: There will be differences among college students' birthplaces in the importance of perceptions for educational services quality. The Hypotheses of H1 and H4 are supported, but H3 and H5 are not supported, and H2 is partly supported. There are several marketing implications. First, this paper shows that college students recognize reliability and responsiveness the same. This is why the character of educational services is very intangible and the relationship between professors and college students is formed through frequent contacts. Second, there is a significant difference between male and female college students importance of perceptions for educational services quality. Third, there is a significant difference among college students majors in the importance of perceptions for educational services quality.