The Spatial Collection Efficiency of Charge Carriers in Photovoltaic and Photoelectrochemical Cells

  title={The Spatial Collection Efficiency of Charge Carriers in Photovoltaic and Photoelectrochemical Cells},
  author={Gideon Segev and Hen Dotan and David S. Ellis and Yifat Piekner and Dino Klotz and Jeffrey W. Beeman and Jason K. Cooper and Daniel A. Grave and Ian D. Sharp and Avner Rothschild},
25 Citations

Modeling Enhanced Performances by Optical Nanostructures in Water-Splitting Photoelectrodes

: Material nanostructuring and optical phenomena on a nanoscale such as plasmonic e ff ects and light scattering have been widely studied for improving the solar-to-hydrogen e ffi ciency of

Spatial Collection in Colloidal Quantum Dot Solar Cells

In thin‐film photovoltaic (PV) research and development, it is of interest to determine where the chief losses are occurring within the active layer. Herein, a method is developed and presented by

Quantification of the loss mechanisms in emerging water splitting photoanodes through empirical extraction of the spatial charge collection efficiency

The operando quantification of surface and bulk losses is key to developing strategies for optimizing photoelectrodes and realizing high efficiency photoelectrochemical solar energy conversion

Non-unity photogeneration yield of mobile charge carriers in transition metal-oxides

Photoelectrochemical water splitting as means of producing clean hydrogen fuel has attracted the attention of researchers for nearly 50 years. Since photoelectrochemical cells must operate in a

Extraction of mobile charge carrier photogeneration yield spectrum of ultrathin-film metal oxide photoanodes for solar water splitting

Although the photogeneration yield spectrum is a key property for photoabsorbers in photovoltaic and photoelectrochemical cells, its characterization remains challenging and an empirical method to extract this parameter through quantum efficiency measurements of ultrathin films is proposed.

Irradiation Direction‐Dependent Surface Charge Recombination in Hematite Thin‐Film Oxygen Evolution Photoanodes

For photoelectrochemical (PEC) devices, light irradiation direction changes photogenerated charge distribution and thus will affect the charge collection efficiency of the photoelectrodes. Herein, we

A Chemically Orthogonal Hole Transport Layer for Efficient Colloidal Quantum Dot Solar Cells

The key materials interface dominating the subpar performance of prior CQD PV devices is demonstrated and a chemically orthogonal HTL that consists of malonic-acid-crosslinked CQDs is developed that enables a 1.4× increase in charge carrier diffusion length in the active layer.

Hybrid photoelectrochemical and photovoltaic cells for simultaneous production of chemical fuels and electrical power

The concept that photogenerated charge carriers can be controllably directed to produce electricity and chemical fuel provides an opportunity to significantly increase the energy return on energy invested in solar fuels systems and can be adapted to a variety of architectures assembled from different materials.

In situ characterizations of photoelectrochemical cells for solar fuels and chemicals

Environmental concerns deriving from fossil fuel dependency are driving an energy transition based on sustainable processes to make fuels and chemicals. Solar hydrogen is the pillar of this new green

The “Rust” Challenge: On the Correlations between Electronic Structure, Excited State Dynamics, and Photoelectrochemical Performance of Hematite Photoanodes for Solar Water Splitting

A snapshot of selected theoretical and experimental developments linking the electronic structure to the photoelectrochemical performance, with particular focus on optoelectronic properties and charge carrier dynamics is presented.



Unravelling Photocarrier Dynamics beyond the Space Charge Region for Photoelectrochemical Water Splitting

Semiconductor photoelectrodes for photoelectrochemical (PEC) water splitting require efficient carrier generation, separation, and transport at and beyond the space charge region (SCR) formed at the

Dynamics of photogenerated holes in surface modified α-Fe2O3 photoanodes for solar water splitting

This paper addresses the origin of the decrease in the external electrical bias required for water photoelectrolysis with hematite photoanodes, observed following surface treatments of such

Generalized quantum efficiency analysis for non-ideal solar cells: Case of Cu2ZnSnSe4

Detailed quantum efficiency (QE) analysis of a nanoparticle-based Cu2ZnSnSe4 (CZTSe) solar cell has been conducted to understand photogenerated carrier collection in the device. Specifically,

Understanding the Thickness-Dependent Performance of Organic Bulk Heterojunction Solar Cells: The Influence of Mobility, Lifetime, and Space Charge.

Doping is most likely the dominant influence on the space charge and has an important effect on the thickness dependence of performance on Si-PCPDTBT solar cells.

Analysis of voltage and temperature dependent photocurrent collection in p3ht/pcbm solar cells

Current-voltage analysis of poly (3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester blend organic solar cells at various temperatures has been recorded and analyzed, allowing the intrinsic junction behavior to be uncovered.

Carrier Collection in Thin-Film CdTe Solar Cells: Theory and Experiment

The traditional p-n junction theory separates the total solar cell current into a voltage-dependent dark current term and a constant (voltage-independent) light current term. However, thin film CdTe

Voltage dependent photocurrent collection in CdTe/CdS solar cells

The voltage dependence of the photocurrent JL(V) of CdTe/CdS solar cells has been characterized by separating the forward current from the photocurrent at several illumination intensities. JL(V)

Accurate determination of the charge transfer efficiency of photoanodes for solar water splitting.

Intensity modulated photocurrent spectroscopy (IMPS) is better suited for accurate determination of ηt because it provides direct information on both the total photocurrent and the surface recombination current, but careful analysis of IMPS measurements at different light intensities is required to account for nonlinear effects.

Charge Carrier Separation in Solar Cells

The selective transport of electrons and holes to the two terminals of a solar cell is often attributed to an electric field, although well-known physics states that they are driven by gradients of


A recently identified relationship between the probability of collection of a photogenerated carrier in a solar cell and the dark minority-carrier concentration at the point of generation is