Journal ArticleDOI
Quantum dot sensitization of organic-inorganic hybrid solar cells
Reads0
Chats0
TLDR
A high surface area pn-heterojunction between TiO2 and an organic p-type charge transport material (spiro-OMeTAD) was sensitized to visible light using lead sulfide (PbS) quantum dots as mentioned in this paper.Abstract:
A high surface area pn-heterojunction between TiO2 and an organic p-type charge transport material (spiro-OMeTAD) was sensitized to visible light using lead sulfide (PbS) quantum dots. PbS quantum dots were formed in situ on a nanocrystalline TiO2 electrode using chemical bath deposition techniques.1 The organic hole conductor was applied from solution to form the sensitized heterojunction. The structure of the quantum dots was analyzed using HRTEM technique. Ultrafast laser photolysis experiments suggested the initial charge separation to proceed in the subpicosecond time range. Transient absorption laser spectroscopy revealed that interfacial charge recombination of the initially formed charge carriers is much faster than in comparable dye-sensitized systems.2,3 The sensitized heterojunction showed incident photon-to-electron conversion efficiencies (IPCE) of up to 45% and energy conversion efficiencies under simulated sunlight AM1.5 (10 mW/cm2) of 0.49%.read more
Citations
More filters
Dissertation
A quantum dot heterojunction photodetector
TL;DR: Bulovic et al. as mentioned in this paper implemented a thin film of cadmium selenide (CdSe) quantum dot sensitizers, sandwiched between an electrontransporting titanium dioxide (TiO2) layer and a hole-transporting N,N’diphenyl-N,N'-bis(3-methylphenyl)-(1, 1’-biphensyl)4, 4'-diamine (TPD) organic small molecule layer.
Journal ArticleDOI
A Theoretical Study on the Operation Principle of Hybrid Solar Cells
Monishka Rita Narayan,Jai Singh +1 more
TL;DR: In this article, the excitation, diffusion and dissociation of singlet and triplet excitons and charge transport of free charge carriers are studied and their corresponding rates are calculated for a flexible P3HT:SiNW hybrid solar cell.
Journal ArticleDOI
Constructing Quantum dots sensitized TiO2 Nanotube p-n Heterojunction for Photoelectrochemical Hydrogen Generation
Omar I. Abdelkarim,Amir Mirzaei,Gurpreet Singh Selopal,Aycan Yurtsever,Ghada Bassioni,Zhiming Wang,Mohamed Chaker,Federico Rosei +7 more
TL;DR: In this article , a photoanode architecture consisting of self-organized TiO 2 nanotubes (NTs) sensitized by CdS/CdSe quantum dots (QDs) and treated with a Cu-based solution to create a p-n heterojunction was presented.
Journal ArticleDOI
Photoinduced Charge Transfer in Poly(3-hexylthiophene)/TiO2 Hybrid Inverse Opals: Photonic vs Interfacial Effects
TL;DR: In this paper, the effects of tailored light-matter interactions on charge transfer in conjugated polymer films were studied using inverse opal structures of titania as the electron acceptor and the model polymer poly(3-hexylthiophene) (P3HT) as the donor.
References
More filters
Journal ArticleDOI
Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies
Udo Bach,D. Lupo,Pascal Comte,Jacques-E. Moser,F. Weissörtel,Josef Salbeck,H. Spreitzer,Michael Grätzel +7 more
TL;DR: A dye-sensitized heterojunction of TiO2 with the amorphous organic hole-transport material 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenyl-amine)9,9′-spirobifluorene (OMeTAD) was described in this article.
Journal ArticleDOI
Quantum-Sized PbS, CdS, Ag2S, Sb2S3, and Bi2S3 Particles as Sensitizers for Various Nanoporous Wide-Bandgap Semiconductors
R. Vogel,P. Hoyer,Horst Weller +2 more
TL;DR: In this article, the photocurrent quantum yield reached values of more than 70% for Q-CdS and Q-PbS sensitized electrodes, while the amount of light absorption is negligibly small.
Journal ArticleDOI
Photosensitization of nanoporous TiO2 electrodes with InP quantum dots
TL;DR: In this paper, a photoelectrochemical cell was formed that consisted of p-type InP QDs loaded on TiO2, which was immersed in a I-/I3- or hydroquinone/quinone acetonitrile solution, and a Pt counter electrode.
Journal ArticleDOI
High efficiency solid-state photovoltaic device due to inhibition of interface charge recombination
TL;DR: In this paper, the performance of dye-sensitized solar cells based on spiro-MeOTAD was improved by controlling charge recombination across the interface of the heterojunction.
Journal ArticleDOI
Highly efficient semiconducting TiO2 photoelectrodes prepared by aerosol pyrolysis
Ladislav Kavan,Michael Grätzel +1 more
TL;DR: In this article, a comparison of optical and photoelectrochemical properties of the TiO2 layer indicates a relative enhancement of light harvesting efficiency due to lowering of reflection losses in the electrolyte.