vestichИзвестия Национальной академии наук Беларуси. Серия химических наукProceedings of the National Academy of Sciences of Belarus, Chemical Series1561-83312524-2342The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"10.29235/1561-8331-2018-54-4-413-418vestich-352Research ArticleНЕОРГАНИЧЕСКАЯ ХИМИЯINORGANIC CHEMISTRYСинтез и фотоэлектрохимические свойства тиоиодида висмутSynthesis and photoelectrochemical properties of bismuth thioiodideКозыревичМ. Е.KazyrevichM. E.

ассистент кафедры электрохимии

Assistant of the Electrochemistry Department

mkozyrevich@gmail.comИвашенкоД. В.IvashenkaD. Y.

магистрант химического факультета

Master Student of the Faculty Chemistry

ivashenkodm@gmail.comБондаренкоЕ. А.BondarenkoE. A.

мл. науч. сотрудник

Junior Researcher

bondarenea@mail.ruСтрельцовЕ. А.StreltsovE. A.

д-р хим. наук, профессор, зав. кафедрой электрохимии

D. Sc. (Chemistry), Professor, Head of the Electrochemistry Department

streltea@bsu.byКулакА. И.KulakA. I.

член-корреспондент, д-р хим. наук, профессор, директор

Corresponding Member, D. Sc. (Chemistry), Professor, Head of the Institute

kulak@igic.bas-net.byБелорусский государственный университет, МинскBelarusian State University, MinskИнститут общей и неорганической химии Национальной академии наук Беларуси, МинскInstitute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus, Minsk201812012019544413418Copyright © Козыревич М.Е., Ивашенко Д.В., Бондаренко Е.А., Стрельцов Е.А., Кулак А.И., 20192019Козыревич М.Е., Ивашенко Д.В., Бондаренко Е.А., Стрельцов Е.А., Кулак А.И.Kazyrevich M.E., Ivashenka D.Y., Bondarenko E.A., Streltsov E.A., Kulak A.I.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestichem.belnauka.by/jour/article/view/352

Разработан метод химического осаждения монокристаллических игл тиоиодида висмута BiSI, характеризующихся высокой, достигающей 55 %, квантовой эффективностью генерации фототока в водных растворах электролитов. Установлено, что введение сульфид- и иодид-анионов в раствор приводит к существенному увеличению абсолютных значений фототока, причем наличие сульфид-ионов вызывает значительный (около 0,5 В) сдвиг энергетических зон BiSI в направлении более отрицательных потенциалов. Обнаруженный эффект представляет интерес для повышения фотонапряжения солнечных элементов на основе BiSI и может найти применение в гетерогенно-сенсибилизированных системах для повышения эффективности инжекции фотоэлектронов из узкозонного сенсибилизатора в матрицу из широкозонного полупроводника.

The method of chemical deposition of monocrystalline bismuth thioiodide BiSI needles with a high quantum efficiency of photocurrent generation (up to 55 %) in aqueous solutions of electrolytes has been developed. It was revealed that the introduction of sulfide and iodide anions into the electrolyte solution leads to an increase of the absolute photocurrent values, as well as the presence of sulfide ions causes the significant (about 0.5 V) shift of BiSI bands energy towards more negative electrode potentials. The observed effect is of interest for increasing the photovoltage of solar cells based on BiSI and can find application in heterogeneous sensitized systems for increasing the efficiency of photoelectrons injection from a narrow-band sensitizer into a matrix of a wide-bandgap semiconductor.

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The authors declare that there are no conflicts of interest present.