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|標題:||Eco-Friendly NaSbS2 Quantum Dot-Sensitized Solar Cells||作者:||Wei-Chi Sun
Siti Utari Rahayu
|關鍵字:||NaSbS2;quantum dot (QD);sensitizer;sodium antimony sulfide;solar cell;solid state||Project:||IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 8, NO. 4, JULY 2018||摘要:||
Ternary sulfide NaSbS2 is a low-cost, environmentfriendly semiconductor that has rarely been studied. This paper demonstrates, for the first time, solid-state NaSbS2 quantum
dot-sensitized solar cells (QDSSCs). NaSbS2 nanoparticles were
synthesized using the sequential ionic layer adsorption reaction
method. Solid-state QDSSCs were fabricated from the synthesized
nanoparticles using spiro-OMeTAD as the hole-transporting electrolyte. The best cell yielded an efficiency of 1.27% under 1 sun. At
the reduced light intensity I0 of 10% sun, the efficiency increased
significantly to 4.11% with an open-circuit voltage Voc of 0.51 V,
a short-circuit current density Jsc of 1.68 mA/cm2, and a fill factor (FF) of 47.8%. A sublinear power law of Jsc I0 0.52 accounts
for the large improvement in performance under low-light intensities because of the reduced carrier recombination. The external
quantum efficiency (EQE) spectrum covered the spectral region of
300–750 nm with a maximum EQE value of 72% at λ = 450 nm.
The present efficiency (4.11%) represents about 30% improvement
over the best previous result (3.18%) of liquid-junction QDSSCs.
The respectable efficiency indicates that NaSbS2 shows potential
as an efficient solar absorber material.
|Appears in Collections:||奈米科學研究所|
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