کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5452328 1513729 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Full paperPerovskite quantum dots integrated in large-area luminescent solar concentrators
ترجمه فارسی عنوان
کامل مقاله نقاط کوانتومی پروسویتی در مرکز متمرکز کننده های خورشیدی متمرکز در منطقه بزرگ می شوند
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی


- We demonstrate large-area and high-efficiency LSCs based on colloidal CsPb(BrxI1−x)3 quantum dots dispersed in a polymer matrix.
- The as-prepared mixed-halide perovskite quantum dots exhibit a large separation between the absorption and emission spectra and high quantum yield over 60%.
- Due to their low reabsorption loss, large-area LSCs based on CsPb(Br0.2I0.8)3 QDs exhibit a ηopt of 2% with a G factor of 45.
- LSCs based on perovskite quantum dots exhibit long term air stability under 4 W UV light illumination for over four hours.

Luminescent solar concentrators (LSCs) are considered a promising technology to reduce the cost of electricity by decreasing the use of expensive photovoltaic materials, such as single-crystal silicon. In addition, LSCs are suitable for applications in building-integrated photovoltaics. Inorganic perovskite quantum dots (QDs) are promising candidates as absorbers/emitters in LSCs, due to their excellent optical properties including size/chemical-composition dependent absorption/emission spectrum, high absorption coefficient, high quantum yield and good stability. However, due to the large overlap between their absorption and emission spectra, it is still very challenging to fabricate large-area high-efficiency LSCs using perovskite QDs. Here we report the synthesis of mixed-halide perovskite CsPb(BrxI1−x)3 QDs with small overlap of absorption and emission spectra, high quantum yield (over 60%) and absorption spectrum ranging from 300 to 650 nm. We use these QDs to build semi-transparent large-area LSCs that exhibit an external optical efficiency of 2% with a geometrical gain factor of 45 (9 cm in length). To date, these represent the brightest and most efficient solution-processed perovskite QDs based LSCs compared to LSCs based on perovskite thin films. The LSCs exhibit long term air stability without any noticeable variation in photoluminescence and lifetime under 4 W UV light illumination for over four hours.

261

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nano Energy - Volume 37, July 2017, Pages 214-223
نویسندگان
, , , , ,