Bulk luminescent solar concentrators based on organic-inorganic CH<sub>3</sub>NH<sub>3</sub>PbBr<sub>3</sub> perovskite fluorophores
SOLAR ENERGY MATERIALS AND SOLAR CELLS, cilt.192, ss.44-51, 2019 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 192
- Basım Tarihi: 2019
- Doi Numarası: 10.1016/j.solmat.2018.12.009
- Dergi Adı: SOLAR ENERGY MATERIALS AND SOLAR CELLS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.44-51
- Orta Doğu Teknik Üniversitesi Adresli: Hayır
Özet
In this paper, we report characterization and performance results of lead bromide perovskite luminescent solar concentrator. CH3NH3PbBr3 fluorophores are synthesized by sonication method and examined by their X-ray diffraction pattern and scanning electron microscopy. Synthesized perovskite shows excitonic absorption at 524 nm and PL emission peak located at 532 nm with a Stokes shift around 8 nm. Micron-sized fluorophores are dissolved in prepared solutions and uniformly embedded in PMMA host with 0.006-0.120%wt concentration. Then, Fabricated devices are cut into 50 x 30 x 5 mm cuboid shapes and placed in a mirror surrounded configuration with an attached photovoltaic cell. Fabricated device is put under standard AM1.5 illumination and the output spectrum from the concentrator is acquired. Re-absorption in the samples is also measured by variable optical path method, showing red-shifts up to 13 nm in the output spectrum. Spatially resolved photo-luminescence maps and optical efficiencies are also presented for each sample. Plus, a Monte-Carlo ray tracing algorithm is developed to assist better understanding the experimental results. Stability of fabricated samples are evaluated under high intensity UV illumination, reporting efficiency reduction around 15% after 24 h. Finally, Comparing current-voltage characterization of the attached photovoltaic cell reveals optimized efficiency enhancement in the 0.04%wt sample above 65%.