Scheduled System Maintenance
On Tuesday, January 23, IEEE Xplore will undergo scheduled maintenance from 1:00-4:00 PM ET.
During this time, there may be intermittent impact on performance. We apologize for any inconvenience.

# IEEE Journal of Photovoltaics

### Early Access Articles

Early Access articles are made available in advance of the final electronic or print versions. Early Access articles are peer reviewed but may not be fully edited. They are fully citable from the moment they appear in IEEE Xplore.

## Filter Results

Displaying Results 1 - 20 of 20
• ### Sputter-Deposited Oxides for Interface Passivation of CdTe Photovoltaics

Publication Year: 2018, Page(s):1 - 7
| | PDF (949 KB)

Commercial CdTe PV modules have polycrystalline thin films deposited on glass, and devices made in this format have exceeded 22% efficiency. Devices made by the authors with a magnesium zinc oxide window layer and tellurium back contact have achieved efficiency over 18%, but these cells still suffer from an open-circuit voltage far below ideal values. Oxide passivation layers made by... View full abstract»

• ### Spectral Impact on Multijunction Solar Cells Obtained by Means of Component Cells of a Different Technology

Publication Year: 2018, Page(s):1 - 8
| | PDF (516 KB)

Spectral indices can be defined to characterize how the solar spectrum affects photovoltaic devices. The use of such indices is particularly important in technologies which are highly dependent on spectral variations, such as tandem, or multijunction (MJ), solar cells. In this paper, we analyze the capability of three effective irradiance values, given by the photocurrents of the components of tri... View full abstract»

• ### Comparison of Double-Side and Equivalent Single-Side Illumination Methods for Measuring the I–V Characteristics of Bifacial Photovoltaic Devices

Publication Year: 2018, Page(s):1 - 7
| | PDF (408 KB)

The equivalent single-side illumination method was proposed as the possible way to measure the bifacial photovoltaic devices. To verify the equivalent single-side illumination method, we compared the current–voltage (I–V) characteristic measurement of bifacial single-cell laminates under double-side and equivalent single-side illumination conditions. The results showed that the short... View full abstract»

• ### (Al)GaInP/GaAs Tandem Solar Cells for Power Conversion at Elevated Temperature and High Concentration

Publication Year: 2018, Page(s):1 - 16
| | PDF (828 KB)

We demonstrate dual-junction (Al)GaInP/GaAs solar cells designed for operation at 400 °C and 1000x concentration. For the top junction, we compare (Al)GaInP solar cells with room-temperature bandgaps ranging from 1.9 to 2.0 eV. At 400 °C, we find that ∼1.9 eV GaInP solar cells have a higher open-circuit voltage and a lower sheet resistance th... View full abstract»

• ### Correcting the Effect of LED Spectra on External Quantum Efficiency Measurements of Solar Cells

Publication Year: 2018, Page(s):1 - 6
| | PDF (454 KB)

Light emitting diodes (LEDs) are increasingly being used as light sources in studying solar cells due to their high power, low cost, and long bulb lifetimes. However, LEDs do not provide the monochromatic illumination that is desired for an external quantum efficiency measurement. This study investigates the error associated with using a broad emission spectrum instead of monochromatic light on me... View full abstract»

• ### Modeling Edge Recombination in Silicon Solar Cells

Publication Year: 2018, Page(s):1 - 7
| | PDF (478 KB)

A new approach to model edge recombination in silicon solar cells is presented. The model accounts for recombination both at the edge of the quasi-neutral bulk as well as at an exposed space-charge-region (SCR), the latter via an edge-length-specific diode property with an ideality factor of 2: a localized J$_{02}$,$_{edge}$. The model is... View full abstract»

• ### Recombination Analysis of Phosphorus-Doped Nanostructured Silicon Oxide Passivating Electron Contacts for Silicon Solar Cells

Publication Year: 2018, Page(s):1 - 8
| | PDF (1275 KB)

We analyze the recombination properties of passivating electron selective contacts based on nanostructured silicon oxide. Our contact design is based on an interfacial buffer oxide capped with a bilayer structure of phosphorus-doped silicon oxide and silicon which is annealed at 900 °C. We investigate in detail the effects of the initial dopant concentration in the bilayer and of the... View full abstract»

• ### Spectral Corrections Based on Air Mass, Aerosol Optical Depth, and Precipitable Water for PV Performance Modeling

Publication Year: 2018, Page(s):1 - 7
| | PDF (634 KB)

Broadband incident global irradiance must be corrected when modeling the performance of a photovoltaic (PV) module to account for the impact of spectrum. However, most existing correction methods exhibit both climate and site dependencies. This paper presents a new set of analytical equations aimed at modeling the spectral effects exhibited by six PV single-junction materials under all operating c... View full abstract»

• ### Carrier-Induced Degradation in Multicrystalline Silicon: Dependence on the Silicon Nitride Passivation Layer and Hydrogen Released During Firing

Publication Year: 2018, Page(s):1 - 8
| | PDF (752 KB)

Carrier-induced degradation (CID) of multicrystalline silicon (mc-Si) solar cells has been receiving significant attention; however, despite this increasing interest, the defect (or defects) responsible for this degradation has not been determined yet. Previous studies have shown that the surface passivation layer and the firing temperature have a significant impact on the rate and extent of this ... View full abstract»

• ### PbS Colloidal Quantum Dot Solar Cells With Organic Hole Transport Layers for Enhanced Carrier Separation and Ambient Stability

Publication Year: 2018, Page(s):1 - 6
| | PDF (891 KB)

We have investigated poly (3-hexylthiophene) (P3HT) as a hole transport material interfacing PbS quantum dot and anode, and found that carrier separation is enhanced by increasing carrier concentration and mobility of P3HT. In addition, the ambient stability of PbS colloidal quantum dot solar cells are shown to be improved by surface oxidation of P3HT. Comparing with MoO$_{3}$<... View full abstract»

• ### Monocrystalline 1.7-eV-Bandgap MgCdTe Solar Cell With 11.2% Efficiency

Publication Year: 2018, Page(s):1 - 6
| | PDF (535 KB)

This work demonstrates a monocrystalline 1.7 eV Mg$_{0.13}$Cd$_{0.87}$Te solar cell with an open-circuit voltage of 1.176 V and an active-area efficiency of 11.2%. The absorber layer is clad in wider bandgap passivation layers that effectively confine electrons and holes via the resulting band offsets. The potential barriers claddi... View full abstract»

• ### Reducing Operating Temperature in Photovoltaic Modules

Publication Year: 2018, Page(s):1 - 9
| | PDF (1277 KB)

Reducing the operating temperature of photovoltaic modules increases their efficiency and lifetime. This can be achieved by reducing the production of waste heat or by improving the rejection of waste heat. We tested, using a combination of simulation and experiment, several thermal modifications in each category. To predict operating temperature and energy yield changes in response to changes to ... View full abstract»

• ### On the Transient Negative Photoconductance in n-type Czochralski Silicon

Publication Year: 2018, Page(s):1 - 7
| | PDF (444 KB)

A transient negative photoconductance phenomenon is observed in n-type Czochralski silicon wafers. After a pulsed light excitation, the measured photoconductance drops to negative values and then increases to the original zero. The paper details how transient negative photoconductance is predicted by the Shockley–Read–Hall rate equations for a system of two defects. For this to occur... View full abstract»

• ### Crystal Growth and Atom Diffusion in (Cu)ZnTe/CdTe via Molecular Dynamics

Publication Year: 2018, Page(s):1 - 6
| | PDF (1377 KB)

Molecular dynamics (MD) simulations and experimental evaporation were applied to study the growth of evaporated (Cu)ZnTe on mono- and polycrystalline CdTe. The simulated structures show polytypism and polycrystallinity, including texturing and grain boundaries, diffusion, and other phenomena in excellent qualitative agreement with experimental atomic probe tomography, transmission electron microsc... View full abstract»

• ### On the Influence of the Photo-Induced Leakage Current in Monolithically Interconnected Modules

Publication Year: 2018, Page(s):1 - 6
| | PDF (1498 KB)

This paper describes the influence of an irradiance-dependent photo-induced leakage current through a semi-insulating GaAs substrate on the performance of photovoltaic monolithically series-interconnected multisegment laser power converters. A reciprocal relation between the resistivity of a semi-insulating GaAs substrate and irradiance of monochromatic light is experimentally observed. A reduced ... View full abstract»

• ### High-Performance Inverted Polymer Solar Cells: Study and Analysis of Different Cathode Buffer Layers

Publication Year: 2018, Page(s):1 - 7
| | PDF (581 KB)

The effect of different cathode buffer layers on the performance of inverted organic solar cells (OSCs) fabric-ated with {poly[[2,6’-4,8-di(5-ethylhexylthienyl)benzo[1,2-b;3,3-b]dithiophene][3-fluoro-2-[(2-ethylhexyl) carbonyl] thieno[3,4-b]thiophenediyl]] (PTB7-Th):[6,6]-phenyl-C71-butyric aci... View full abstract»

• ### Extracting Nonradiative Parameters in III–V Semiconductors Using Double Heterostructures on Active p-n Junctions

Publication Year: 2018, Page(s):1 - 7
| | PDF (970 KB)

A novel method of extracting the nonradiative lifetime of Ga$_{0.51}$In$_{0.49}$P lattice matched to GaAs by exploiting luminescence coupling is discussed. The method requires a GaInP double heterostructure monolithically grown on a GaAs photodetector for quantum efficiency measurements. The method then extracts the nonradiative lifetime ... View full abstract»

• ### An Investigation of the Role of Radiative and Nonradiative Recombination Processes in InAs/GaAs$_{1-x}$ Sb$_{x}$ Quantum Dot Solar Cells

Publication Year: 2017, Page(s):1 - 6
| | PDF (2190 KB)

An InAs/GaAs$_{0.86}$ Sb$_{0.14}$ quantum dot solar cell and a GaAsSb control cell were investigated using temperature-dependent current density–voltage (J–V), external quantum efficiency, photoluminescence (PL), and electroluminescence (EL) measurements. Thermally activated defect states associated with the GaAsSb matrix ma... View full abstract»

• ### Robust PV Degradation Methodology and Application

Publication Year: 2018, Page(s):1 - 7
| | PDF (653 KB)

The degradation rate plays an important role in predicting and assessing the long-term energy generation of photovoltaics (PV) systems. Many methods have been proposed for extracting the degradation rate from operational data of PV systems, but most of the published approaches are susceptible to bias due to inverter clipping, module soiling, temporary outages, seasonality, and sensor degradation. ... View full abstract»

• ### Building a Six-Junction Inverted Metamorphic Concentrator Solar Cell

Publication Year: 2017, Page(s):1 - 7
| | PDF (865 KB)

We propose practical six-junction (6J) inverted metamorphic multijunction (IMM) concentrator solar cell designs with the potential to exceed 50% efficiency using moderately high quality junction materials. We demonstrate the top three junctions and their monolithic integration lattice matched to GaAs using 2.1-eV AlGaInP, 1.7-eV AlGaAs or GaInAsP, and 1.4-eV GaAs with external radiative eff... View full abstract»

## Aims & Scope

The IEEE Journal of Photovoltaics is a peer-reviewed, archival publication reporting original and significant research results that advance the field of photovoltaics (PV). The PV field is diverse in its science base ranging from semiconductor and PV device physics to optics and the materials sciences. The journal publishes articles that connect this science base to PV science and technology. The intent is to publish original research results that are of primary interest to the photovoltaic specialist.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Timothy J. Anderson
Chemical Engineering Department
University of Florida
Gainesville, FL  32611  32611  USA
tim@ufl.edu
Phone: 352-392-8049 x 1301