Coupled Optical and Electronic Modeling of Dye-Sensitized Solar Cells for Steady-State Parameter Extraction

Wenger, Sophie; Schmid, Matthias; Rothenberger, Guido; Gentsch, Adrian; Grätzel, Michaël; Schumacher, Jürgen

doi:10.1021/jp111565q

Cited by 60 publications

(67 citation statements)

References 40 publications

(86 reference statements)

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“…[47][48][49] (ii) Silica particles are considered as perfect spherical dielectric objects with diameters varied in a specic range and they are inserted exactly in middle of the dyesensitized layer. [47][48][49] (ii) Silica particles are considered as perfect spherical dielectric objects with diameters varied in a specic range and they are inserted exactly in middle of the dyesensitized layer.…”

Section: Resultsmentioning

confidence: 99%

Photonic design of embedded dielectric scatterers for dye sensitized solar cells

et al. 2015

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Embedded dielectric scatterers comprise an important approach for light trapping in dye-sensitized solar cells (DSCs) due to their simple fabrication process. The challenge in applying these scatterers lies in finding the optimal dimensions and concentration of the scatterers. This requires many experiments and it is often quite difficult to have a starting point for optimizing the concentration. Based on theories of light propagation in random media, we propose a simple model for DSCs with embedded silica spherical particles. Then, by full-wave optical calculations, we determine a narrow range for the concentration of silica particles that leads to the largest optical absorption in the cell. The simulation results were verified by realizing DSCs with different concentrations of silica particles. A power conversion efficiency of 8.08% in an 11 mm-thick N719-sensitized DSC was achieved with 6 vol% embedded silica, which further increased to 9.30% by applying a white scattering layer on the rear-side of the counter electrode. The design approach, presented here, is a general approach that can be applied for other types of solar light harvesting structures with low optical absorption coefficient. † Electronic supplementary information (ESI) available: Side-view SEM image to estimate layer thickness, diffuse reectance and diffuse transmittance spectra of the layers, digital photographs of lms, and dye loading data. See

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Section: Resultsmentioning

confidence: 99%

Photonic design of embedded dielectric scatterers for dye sensitized solar cells

et al. 2015

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“…This different behavior is clearly explained through the analysis of the cell's IPCE (Figure b). Indeed, the IPCE of the reference cell reaches 87% at 520 nm, which is close to the maximum value possible for Z907 taking into account reflection losses at the air‐glass and glass‐FTO interfaces . In contrast, the IPCE at 620 nm is only 56% with a TEC15 counter electrode so that it has room to be increased to 74% by reflecting back the unabsorbed photons using the BR640 conducting photonic counter electrode.…”

Section: Comparison Of the Photovoltaic Characteristics (Best Cells) mentioning

confidence: 99%

See‐Through Dye‐Sensitized Solar Cells: Photonic Reflectors for Tandem and Building Integrated Photovoltaics

et al. 2013

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“…Internal quantum efficiency (IQE) is a useful device metric which measures a solar cell's ability to convert photons absorbed within the active material into electrons, and allows for diagnosis of charge collection and absorption problems 12. In ssDSCs, the notion of IQE may be a bit ambiguous, as the active layer consists of a mesoporous network of TiO 2 nanoparticles, an adsorbed sensitizing dye, and infiltrated HTM (typically 2,2′,7,7′‐tetrakis‐( N,N ‐di‐ p ‐methoxyphenylamine)9,9'‐spirobifluorene, known as spiro‐OMeTAD).…”

Section: Introductionmentioning

confidence: 99%

Parasitic Absorption and Internal Quantum Efficiency Measurements of Solid‐State Dye Sensitized Solar Cells

Margulis

Hardin

Ding

et al. 2013

Advanced Energy Materials

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The internal quantum efficiency (IQE) of solid‐state dye sensitized solar cells (ssDSCs) is measured using a hybrid optical modeling plus absorptance measurement approach which takes into account the parasitic absorption of the hole transport material (HTM). Across device thicknesses of 1 to 4 microns, ssDSCs sensitized with Z907 and TT1 dyes display relatively constant IQEs of approximately 88% and 36%, respectively, suggesting excellent charge collection efficiencies for both dyes but poor carrier injection for TT1 devices. The addition of more coadsorbent is shown to increase the IQE of TT1 up to approximately 58%, but significantly lowers dye loading. Finally, optical losses due to absorption by the HTM are quantified and found to be a significant contribution to photocurrent losses for ssDSCs sensitized with poor absorbers such as Z907, as the weak absorption of the dye gives the HTM opportunity for significant parasitic absorption within the active layer.

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Coupled Optical and Electronic Modeling of Dye-Sensitized Solar Cells for Steady-State Parameter Extraction

Cited by 60 publications

References 40 publications

Photonic design of embedded dielectric scatterers for dye sensitized solar cells

Photonic design of embedded dielectric scatterers for dye sensitized solar cells

See‐Through Dye‐Sensitized Solar Cells: Photonic Reflectors for Tandem and Building Integrated Photovoltaics

Parasitic Absorption and Internal Quantum Efficiency Measurements of Solid‐State Dye Sensitized Solar Cells

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