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International Affairs Students Current Students Alumni Faculty/Staff Careers--> TOHOKU UNIVERSITYCREATING GLOBAL EXCELLENCE Search 日本語 Contact Tohoku University --> About Facts & Figures Facilities Organization Chart History President's Message Top Global University Project Designated National University Global Network Promotional Videos Academics Undergraduate Graduate Courses in English Exchange Programs Summer Programs Double Degree Programs Academic Calendar Syllabus Admissions Undergraduate Admissions Graduate Admissions Fees and Expenses Financial Aid Research Feature Highlights Research Releases University Research News Research Institutes Visitor Research Center Research Profiles Academic Research Staff Campus Life International Support Office IT Services Facilities Dining & Shops Campus Bus Clubs & Circles News University News Research--> Arts & Culture Health & Sports Campus & Community Press Release--> International Visit Alumni Careers Events Exhibits Music Special Event Lecture Alumni--> Map & Directions Campus Maps & Bus--> Facilities Map--> TOHOKUUNIVERSITY About Academics Admissions Research Campus Life News Events International Affairs Students Current Students Alumni Faculty/Staff Promotional Videos Subscribe to our Newsletter Map & Directions Contact Jobs & Vacancies Emergency Information Site Map 日本語 Close Home Research News N-type Conductive Tin Sulfide Thin Films: Towards Environmentally Friendly Solar Cells Research News N-type Conductive Tin Sulfide Thin Films: Towards Environmentally Friendly Solar Cells 2021-12-13 Tin sulfide (SnS) is an abundant, safe, and environmentally friendly solar cell material. This inexpensive material is forecast to be used in next-generation solar cell panels. A research group led by Issei Suzuki and Sakiko Kawanishi, assistant professors at Tohoku University's Institute of Multidisciplinary Research for Advanced Materials, has fabricated n-type conductive SnS thin films by impurity doping for the first time. Conventional SnS thin films are usually p-type conductive. Thus, SnS thin-film solar cells have been fabricated using a pn heterojunction with p-type SnS thin film and other n-type semiconductor thin films, such as CdS. However, the conversion efficiency of such heterojunction devices has stagnated at approximately 5%, rendering their use impractical. The SnS thin-film solar cells employing a pn homojunction, which uses SnS thin films for both p-type and n-type layers, is expected to exhibit higher conversion efficiency. Yet, n-type conducive SnS thin films without toxic elements have never been achieved before. The world's first n-type conductive SnS thin film without containing toxic elements. ©Issei Suzuki et al. Utilizing chlorine-doping and a sulfur plasma supply, the research group reduced the lattice defects inhibiting the n-type conversion of SnS, realizing the world's first n-type SnS thin films without toxic elements. A schematic illustration of the new technique used to fabricate n-type SnS thin films. The n-type conductive SnS thin films were achieved by fabricating thin films of chlorine(Cl)-doped SnS with a supply of sulfur plasma. ©Issei Suzuki et al. "Our realization paves the way for practical pn homojunction SnS thin-film solar cells," said Suzuki. The results of the research were published in Physical Review Materials on December 9, 2021. Publication Details: Title: N-Type Electrical Conduction in SnS Thin FilmsAuthors: Issei Suzuki, Sakiko Kawanishi, Sage R. Bauers, Andriy Zakutayev, Zexin Lin, Satoshi Tsukuda, Hiroyuki Shibata, Minseok Kim, Hiroshi Yanagi and Takahisa OmataJournal: Physical Review MaterialsDOI: https://doi.org/10.1103/PhysRevMaterials.5.125405 Press release in Japanese Contact: Issei Suzuki Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University Email: issei.suzukitohoku.ac.jp Website: http://www2.tagen.tohoku.ac.jp/lab/omata/english/ Sakiko Kawanishi Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University Email: s-kawatohoku.ac.jp Website: http://www2.tagen.tohoku.ac.jp/lab/shibata/english/ Archives 2014&＃24180; 2015&＃24180; 2016&＃24180; 2017&＃24180; 2018&＃24180; 2019&＃24180; 2020&＃24180; 2021&＃24180; 2022&＃24180; 2023&＃24180; Page Top About Tohoku University Academics Admissions Research Campus Life News Events International Affairs Students Alumni Promotional Videos Subscribe to our Newsletter Map & Directions Contact Tohoku University Jobs & Vacancies Emergency Information Site Map Media Enquiries Parent & Family Support Public Facilities Contact Tohoku University