Hybrid solar cells using PbS nanoparticles

Güneş, Serap; Fritz, Karolina P.; Neugebauer, Helmut; Sariciftci, Niyazi Serdar; Kumar, Sandeep; Scholes, Gregory D.

doi:10.1016/j.solmat.2006.10.016

Cited by 205 publications

(95 citation statements)

References 16 publications

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“…With size-quantized PbS nanoparticles, 3% incident photon to current efficiencies (IPCE) under 550-nm monochromatic irradiation is obtained. 75 A 6.9% IPCE under 0.1 milliwatt per square illumination at 515 nm is obtained with 7-nanometer by 60-nanometer CdSe nanorods. 76 …”

Section: Charge Carrier Generationmentioning

confidence: 95%

Optical properties of nanostructured materials: a review

2011

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Abstract. Depending on the size of the smallest feature, the interaction of light with structured materials can be very different. This fundamental problem is treated by different theories. If first order theories are sufficient to describe the scattering from low roughness surfaces, second order or even higher order theories must be used for high roughness surfaces. Random surface structures can then be designed to distribute the light in different propagation directions. For complex structures such as black silicon, which reflects very little light, the theory needs further development. When the material is periodically structured, we speak about photonic crystals or metamaterials. Different theoretical approaches have been developed and experimental techniques are rapidly progressing. However, some work still remains to understand the full potential of this field. When the material is structured in dimension much smaller than the wavelength, the notion of complex refractive index must be revisited. Plasmon resonance can be excited by a progressing wave on metallic nanoparticles inducing a shaping of the absorption band and of the dispersion of the extinction coefficient. This addresses the problem of the permittivity of such metallic nanoparticles. The coupling between several metallic nanoparticles induces a field enhancement in the surrounding media, which can increase phenomena like scattering, absorption, luminescence, or Raman scattering. For semiconductor nanoparticles, electron confinement also induces a modulated absorption spectra. The refractive index is then modified. The bandgap of the material is changed because of the discretization of the electron energy, which can be controlled by the nanometers size particles. Such quantum dots behave like atoms and become luminescent. The lifetime of the electron in the excited states are much larger than in continuous energy bands. Electrons in coupled quantum dots behave as they do in molecules. Many applications should be forthcoming in the near future in this field of research. C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

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Section: Charge Carrier Generationmentioning

confidence: 95%

Optical properties of nanostructured materials: a review

2011

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“…For example, in DSSCs, improved injection from vibrationally relaxed excited states following a downward shift in the TiO 2 conduction band shows up as an increased photocurrent at long wavelengths, where photon energies are insufficient to promote electrons to a vibrationally hot excited state [74]. A comparison of the IPCE spectrum with the absorption spectrum of the component materials in a blend film can also help determine whether both components of a polymer/nanocrystal [75] or polymer/ fullerene [36] blend are contributing effectively to the photocurrent. In a bilayer film, comparison of the IPCE and absorption spectra can also indicate which interface serves to dissociate photogenerated excitons [76].…”

Section: Incident Photon Conversion Efficiencymentioning

confidence: 99%

Photovoltaic Polymer Materials

Assender

Barkhouse

2010

Photochemistry and Photophysics of Polymer Materials

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“…PbS is a IV-VI semiconductor with a narrow bandgap (0.41 eV) and large excitation Bohr radius (18 nm) [25], which has been widely used in many fields such as Pb 2+ ionselective sensors [26], IR detector [27], photography [28] and hybrid solar cell [29,30]. On account of its unique semiconducting and optical properties, extensive effort has been devoted to prepare various PbS crystals [31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%