Efficient PbS/CdS co-sensitized solar cells based on TiO2 nanorod arrays

Abstract

Narrow bandgap PbS nanoparticles, which may expand the light absorption range to the near-infrared region, were deposited on TiO2 nanorod arrays by successive ionic layer adsorption and reaction method to make a photoanode for quantum dot-sensitized solar cells (QDSCs). The thicknesses of PbS nanoparticles were optimized to enhance the photovoltaic performance of PbS QDSCs. A uniform CdS layer was directly coated on previously grown PbS-TiO2 photoanode to protect the PbS from the chemical attack of polysulfide electrolytes. A remarkable short-circuit photocurrent density (approximately 10.4 mA/cm2) for PbS/CdS co-sensitized solar cell was recorded while the photocurrent density of only PbS-sensitized solar cells was lower than 3 mA/cm2. The power conversion efficiency of the PbS/CdS co-sensitized solar cell reached 1.3%, which was beyond the arithmetic addition of the efficiencies of single constituents (PbS and CdS). These results indicate that the synergistic combination of PbS with CdS may provide a stable and effective sensitizer for practical solar cell applications.

Photon Absorption Enhancement of TiO2 Nanotube Arrays Decorated with Aluminum Nanoparticles

“…Briefly, thermal evaporation machine can deliver highly uniform aluminum nanoparticle films on various substrates and can be used as a facile method to tune the morphology and thickness of the films. Thermal evaporation method for aluminum deposition [29] Nevertheless, a large amount of laboratories still work on evaporation, such technique has been gradually replaced by sputtering in most micro technologies due to certain reasons. In terms of covering step problem, the thickness of metal layers is constantly raised by the lateral dimensions of transistors.…”

Disain Geometri Reaktor Fotosel Cahaya Ruang

“…Ketiga, pengembangan pada aspek optik meliputi absorber cahaya [29] , penguatan dan penggeseran cahaya [30] , konsentrator [31] , antireflektor [32] , sensitizer [33] , collector hole [34] , kemiringan panel [35,36] dan block dinding panel yang terintegrasi dengan semikonduktor [37] . Keempat, pada aspek semikonduktor sel PV, meliputi sel PV tipe N, sel PV tipe P dan sel PV heterojunction serta sel PV multi P-N, juga telah dikembangkan [38,39] .…”

Heterojunction Solar Cell Based on p-type PbS Quantum Dots and Two n-type Nanocrystals CdS and ZnO

“…All the layers were deposited in a fume hood with good ventilation using a layerby-layer spin-coating method deposition method at 2,500 rpm for 15 s each deposition time, except for CdS nanoparticles layer was deposited by successive ionic layer adsorption and reaction (SILAR) technique [18].…”

“…(2) QDs sensitized cells where PbS QDs were used as alternative to the dyes in dye sensitized cells with liquid electrolyte existence [12][13][14][15][16][17][18]. (3) Homojunction cells where n-doped PbS QDs were used [19].…”