Research Output 1900 2018

2018

Effect of excessive Pb content in the precursor solutions on the properties of the lead acetate derived CH3NH3PbI3 perovskite solar cells

Chen, Y., Yerramilli, A., Shen, Y., Zhao, Z. & Alford, T. Jan 1 2018 In : Solar Energy Materials and Solar Cells. 174, p. 478-484 7 p.

Research output: Research - peer-reviewArticle

lead acetate
Perovskite solar cells
Lead
Conversion efficiency
Solar cells
2017

A Comparative Study on TID Influenced Lateral Diffusion of Group 11 Metals into GexS1-x and GexSe1-x Systems: A Flexible Radiation Sensor Development Perspective

Mahmud, A., Gonzalez-Velo, Y., Barnaby, H. J., Kozicki, M. N., Mitkova, M., Holbert, K. E., Goryll, M., Alford, T. L., Taggart, J. L. & Chen, W. Aug 1 2017 In : IEEE Transactions on Nuclear Science. 64, 8, p. 2292-2299 8 p., 7882640

Research output: Research - peer-reviewArticle

traveling ionospheric disturbances
electrodes
sensors
radiation
metals
laser annealing
microwaves
annealing
scanning
Microwaves

Resistive Switching Characteristics of Flexible TiO₂ Thin Film Fabricated by Deep Ultraviolet Photochemical Solution Method

Chen, Y., Li, L., Yin, X., Yerramilli, A., Shen, Y., Song, Y., Bian, W., Li, N., Zhao, Z., Qu, W., Theodore, N. D. & Alford, T. L. Sep 23 2017 (Accepted/In press) In : IEEE Electron Device Letters.

Research output: Research - peer-reviewArticle

Thin films
Tin oxides
Polyethylene terephthalates
Indium
Switches
Indium
Anodes
Electrodes
indium tin oxide
Organic solar cells
2016

A percolative approach to investigate electromigration failure in printed Ag structures

Zhao, Z., Mamidanna, A., Lefky, C., Hildreth, O. & Alford, T. L. Sep 28 2016 In : Journal of Applied Physics. 120, 12, 125104

Research output: Research - peer-reviewArticle

electromigration
inks
silver
microelectronics
life (durability)
1 Citations

Flexible Ag-ChG Radiation Sensors: Limit of Detection and Dynamic Range Optimization Through Physical Design Tuning

Mahmud, A., Gonzalez-Velo, Y., Saremi, M., Barnaby, H. J., Kozicki, M. N., Holbert, K. E., Mitkova, M., Alford, T. L., Goryll, M., Yu, W., Mahalanabis, D., Chen, W., Chamele, N. & Taggart, J. Jul 18 2016 (Accepted/In press) In : IEEE Transactions on Nuclear Science.

Research output: Research - peer-reviewArticle

dynamic range
tuning
optimization
sensors
radiation
1 Citations

Measurement of InAsBi mole fraction and InBi lattice constant using Rutherford backscattering spectrometry and X-ray diffraction

Shalindar, A. J., Webster, P. T., Wilkens, B. J., Alford, T. L. & Johnson, S. R. Oct 14 2016 In : Journal of Applied Physics. 120, 14, 145704

Research output: Research - peer-reviewArticle

backscattering
diffraction
spectroscopy
x rays
sidebands

The extent of dopant activation after microwave and rapid thermal anneals using similar heating profiles

Gunawansa, T., Zhao, Z., Theodore, N. D., Lanz, A. R. & Alford, T. L. Jan 1 2016 EPD Congress 2015. Springer International Publishing, p. 141-148 8 p.

Research output: ResearchChapter

Chemical activation
Microwaves
Doping (additives)
Heating
Hot Temperature
4 Citations
Electrodes
Organic solar cells
Indium
Tin oxides
indium tin oxide
2015
6 Citations

Advances in 2D/3D printing of functional nanomaterials and their applications

Choi, J. Y., Das, S., Theodore, N. D., Kim, I., Honsberg, C., Choi, H. W. & Alford, T. L. 2015 In : ECS Journal of Solid State Science and Technology. 4, 4, p. P3001-P3009

Research output: Research - peer-reviewArticle

Nanostructured materials
Printing
Functional materials
Ointments
Ink
6 Citations

Aging effect of a molecularly imprinted polymer on a quartz tuning fork sensor for detection of volatile organic compounds

Deng, Y., Chen, C., Qin, X., Xian, X., Alford, T. L., Choi, H. W., Tsow, F. & Forzani, E. S. 2015 In : Sensors and Actuators, B: Chemical. 211, p. 25-32 8 p.

Research output: Research - peer-reviewArticle

forks
volatile organic compounds
quartz
tuning
sensors

A Method for Efficient Transmittance Spectrum Prediction of Transparent Composite Electrodes

Zhao, Z., Dhar, A. & Alford, T. L. Jul 1 2015 In : JOM. 67, 7, p. 1612-1616 5 p.

Research output: Research - peer-reviewArticle

Metals
Electrodes
Composite materials
Oxides
Indium

As-doped Si's complex permittivity and its effects on heating curve at 2.45 GHz frequency

Varadan, S., Pan, G., Zhao, Z. & Alford, T. Jun 29 2015 2015 Joint Conference of the IEEE International Frequency Control Symposium and the European Frequency and Time Forum, FCS 2015 - Proceedings. Institute of Electrical and Electronics Engineers Inc., p. 111-116 6 p. 7138802

Research output: ResearchConference contribution

Silicon wafers
Permittivity
Doping (additives)
Heating
Silicon

Carrier recombination lifetime measurement in silicon epitaxial layers using optically excited MOS capacitor technique

Elhami Khorasani, A., Schroder, D. K. & Alford, T. L. May 1 2015 In : IEEE Transactions on Electron Devices. 62, 5, p. 1553-1560 8 p., 7067362

Research output: Research - peer-reviewArticle

MOS capacitors
Epitaxial layers
Silicon
Solid state devices
MOS devices
1 Citations

Computational modeling of optical properties in aluminum nanolayers inserted in ZnO for solar cell electrodes

Rwenyagila, E. R., Agyei-Tuffour, B., Onogu, K. O., Akin-Ojo, O., Zebaze Kana, M. G., Alford, T. L. & Soboyejo, W. O. 2015 In : Optics Letters. 40, 16, p. 3914-3917 4 p.

Research output: Research - peer-reviewArticle

solar cells
aluminum
optical properties
electrodes
simulation

Controlled Microwave Processing of IGZO Thin Films for Improved Optical and Electrical Properties

Dhar, A. & Alford, T. L. Jul 1 2015 In : JOM. 67, 7, p. 1624-1628 5 p.

Research output: Research - peer-reviewArticle

Zinc Oxide
Gallium
Indium
Oxide films
Electric properties

Determination of complex permittivity for low- and high-loss materials at microwave frequencies

Varadan, S. K., Zhang, L., Pan, G. & Alford, T. May 7 2015 2014 IEEE 23rd Conference on Electrical Performance of Electronic Packaging and Systems, EPEPS 2014. Institute of Electrical and Electronics Engineers Inc., p. 219-222 4 p. 7103638

Research output: ResearchConference contribution

Microwave frequencies
Polychlorinated biphenyls
Permittivity
Copper
Bessel functions
3 Citations

Effect of Different Substrates on the Wettability and Electrical Properties of Au Thin Films Deposited by Sputtering

Dhar, A., Zhao, Z. & Alford, T. L. Mar 10 2015 In : JOM. 67, 4, p. 845-848 4 p.

Research output: Research - peer-reviewArticle

Sputtering
Wetting
Electric properties
Thin films
Substrates
4 Citations
Gold
Multilayers
Electric properties
Optical properties
Annealing
7 Citations
Nanospheres
Silicon
Silicon Dioxide
Metals
Fabrication
2 Citations

Optimization of flexible Ag-chalcogenide glass sensors for radiation detection

Mahmud, A., Gonzalez-Velo, Y., Saremi, M., Barnaby, H. J., Kozicki, M. N., Holbert, K. E., Mitkova, M., Alford, T. L., Goryll, M., Mahalanabis, D., Yu, W., Chen, W. & Taggart, J. Dec 24 2015 2015 15th European Conference on Radiation and Its Effects on Components and Systems, RADECS 2015. Institute of Electrical and Electronics Engineers Inc., Vol. 2015-December, 7365644

Research output: ResearchConference contribution

optimization
glass
sensors
radiation
Radiation
3 Citations
Zinc Oxide
Yttrium
Doping (additives)
Annealing
Organic solar cells
21 Citations

P3HT: PC61BM based solar cells employing solution processed copper iodide as the hole transport layer

Das, S., Choi, J. Y. & Alford, T. L. 2015 In : Solar Energy Materials and Solar Cells. 133, p. 255-259 5 p.

Research output: Research - peer-reviewArticle

Iodides
Copper
Solar cells
Organic solar cells
X ray diffraction analysis
8 Citations

Photocurrent enhancements of organic solar cells by altering dewetting of plasmonic Ag nanoparticles

Fleetham, T., Choi, J. Y., Choi, H. W., Alford, T., Jeong, D. S., Lee, T. S., Lee, W. S., Lee, K. S., Li, J. & Kim, I. Sep 21 2015 In : Scientific Reports. 5, 14250

Research output: Research - peer-reviewArticle

drying
photocurrents
solar cells
nanoparticles
augmentation
2 Citations

Prediction of transmittance spectra for transparent composite electrodes with ultra-thin metal layers

Zhao, Z., Khorasani, A. E., Theodore, N. D., Dhar, A. & Alford, T. L. Nov 28 2015 In : Journal of Applied Physics. 118, 20, 205304

Research output: Research - peer-reviewArticle

transmittance
composite materials
electrodes
predictions
metals

The extent of dopant activation after microwave and rapid thermal anneals using similar heating profiles

Gunawansa, T., Zhao, Z., Theodore, N. D., Lanz, A. R. & Alford, T. L. 2015 TMS Annual Meeting. January ed. Minerals, Metals and Materials Society, Vol. 2015-January, p. 141-148 8 p.

Research output: ResearchConference contribution

Chemical activation
Microwaves
Doping (additives)
Heating
Hot Temperature
2 Citations

The impact of two-way formative feedback and web-enabled resources on student resource use and performance in materials courses

Krause, S. J., Baker, D. R., Carberry, A. R., Alford, T. L., Ankeny, C. J., Brooks, B. J., Koretsky, M. & Gibbons, B. J. 2015 122nd ASEE Annual Conference and Exposition: Making Value for Society. American Society for Engineering Education

Research output: ResearchConference contribution

Students
Feedback
Textbooks
Teaching
2014

A fast I-V screening measurement for tddb assessment of ultra-thick inter-metal dielectrics

Khorasani, A. E., Griswold, M. & Alford, T. L. Jan 2014 In : IEEE Electron Device Letters. 35, 1, p. 117-119 3 p., 6680596

Research output: Research - peer-reviewArticle

Screening
Metals
Electric potential
Electric breakdown
Oxides
3 Citations

A fast technique to screen carrier generation lifetime using DLTS on MOS capacitors

Elhami Khorasani, A., Schroder, D. K. & Alford, T. L. 2014 In : IEEE Transactions on Electron Devices. 61, 9, p. 3282-3288 7 p., 6867334

Research output: Research - peer-reviewArticle

MOS capacitors
Deep level transient spectroscopy
Screening
Capacitors
Metals
2 Citations

Characterizing and addressing student learning issues and misconceptions (SLIMs) in materials science with muddiest point reflections and fast formative feedback

Krause, S. J., Baker, D. R., Carberry, A. R., Alford, T. L., Ankeny, J., Koretsky, M., Brooks, B. J., Waters, C., Gibbons, B. J., Maass, S. & Chan, C. K. 2014 ASEE Annual Conference and Exposition, Conference Proceedings. American Society for Engineering Education

Research output: ResearchConference contribution

Materials science
Students
Feedback
Monitoring
Warehouses
Electric properties
Optical properties
Microwaves
Processing
indium tin oxide
3 Citations
Transport properties
Optical properties
Electrodes
Composite materials
Organic solar cells
6 Citations

Enhanced power conversion efficiency of organic solar cells by embedding Ag nanoparticles in exciton blocking layer

Kim, I., Fleetham, T., Choi, H. W., Choi, J. Y., Lee, T. S., Jeong, D. S., Lee, W. S., Lee, K. S., Lee, Y. K., Alford, T. L. & Li, J. 2014 In : Organic Electronics: physics, materials, applications. 15, 10, p. 2414-2419 6 p.

Research output: Research - peer-reviewArticle

embedding
solar cells
excitons
nanoparticles
Excitons
6 Citations

Flexible sensors based on radiation-induced diffusion of ag in chalcogenide glass

Dandamudi, P., Mahmud, A., Gonzalez-Velo, Y., Kozicki, M. N., Barnaby, H. J., Roos, B., Alford, T. L., Ailavajhala, M., Mitkova, M. & Holbert, K. E. Dec 1 2014 In : IEEE Transactions on Nuclear Science. 61, 6, p. 3432-3437 6 p., 6949157

Research output: Research - peer-reviewArticle

glass
sensors
radiation
Radiation
Glass
3 Citations

Gate-controlled reverse recovery for characterization of LDMOS body diode

Khorasani, A. E., Griswold, M. & Alford, T. L. Nov 1 2014 In : IEEE Electron Device Letters. 35, 11, p. 1079-1081 3 p., 6895242

Research output: Research - peer-reviewArticle

Diodes
Recovery
Direction compound
MOSFET devices
Monitoring
8 Citations

Improved efficiency of P3HT: PCBM solar cells by incorporation of silver oxide interfacial layer

Das, S. & Alford, T. L. Jul 28 2014 In : Journal of Applied Physics. 116, 4, 044905

Research output: Research - peer-reviewArticle

silver oxides
solar cells
shunts
ITO (semiconductors)
equivalent circuits
1 Citations

JTF web-enabled faculty and student tools for more effective teaching and learning through two-way, Frequent Formative Feedback

Krause, S. J., Baker, D. R., Carberry, A. R., Alford, T. L., Ankeny, C. J., Koretsky, M., Brooks, B. J., Gilbuena, D. M., Waters, C., Gibbons, B. J., Stuart, W. J., Maass, S. & Chan, C. K. 2014 ASEE Annual Conference and Exposition, Conference Proceedings. American Society for Engineering Education

Research output: ResearchConference contribution

Teaching
Students
Feedback
Textbooks
Warehouses
2 Citations

Optically excited mos-capacitor for recombination lifetime measurement

Khorasani, A. E., Schroder, D. K. & Alford, T. L. Oct 1 2014 In : IEEE Electron Device Letters. 35, 10, p. 986-988 3 p., 6878420

Research output: Research - peer-reviewArticle

MOS capacitors
Epitaxial layers
Capacitors
Impurities
Monitoring
21 Citations
Multilayers
Electrodes
Composite materials
Substrates
Temperature
9 Citations

Self-assembled monolayer modified ITO in P3HT: PC61BM organic solar cells with improved efficiency

Das, S., Joslin, J. & Alford, T. L. May 2014 In : Solar Energy Materials and Solar Cells. 124, p. 98-102 5 p.

Research output: Research - peer-reviewArticle

Self assembled monolayers
Tin oxides
Short circuit currents
Indium
Solar cells
13 Citations

Solvent-controlled spin-coating method for large-scale area deposition of two-dimensional silica nanosphere assembled layers

Choi, J. Y., Alford, T. L. & Honsberg, C. B. May 27 2014 In : Langmuir. 30, 20, p. 5732-5738 7 p.

Research output: Research - peer-reviewArticle

Nanospheres
Spin coating
Silica
Silicon Dioxide
coating
1 Citations

Structural properties of ZnO nanowires directly grown on a carbon film in ZnCl2aqueous solution

Choi, H. W., Theodore, N. D., Das, S., Dhar, A. & Alford, T. L. Nov 15 2014 In : Journal of Crystal Growth. 406, p. 26-30 5 p.

Research output: Research - peer-reviewArticle

Carbon films
Nanowires
Structural properties
nanowires
aqueous solutions
2013

Biosensor and methods of fabricating the same

Alford, T. Feb 18 2013

Research output: ResearchPatent

Biosensors
Copper
Temperature
Substrates
Copper oxides
2 Citations

Characterization and adhesion in Cu/Ru/SiO2/Si multilayer nano-scale structure for Cu metallization

Chawla, N., Venkatesh, S. H., Singh, D. R. P. & Alford, T. L. Apr 2013 In : Journal of Materials Engineering and Performance. 22, 4, p. 1085-1090 6 p.

Research output: Research - peer-reviewArticle

Metallizing
Multilayers
Adhesion
Glues
Delamination
3 Citations

Effective dopant activation by susceptor-assisted microwave annealing of low energy boron implanted and phosphorus implanted silicon

Zhao, Z., Theodore, N. D., Vemuri, R. N. P., Lu, W., Lau, S. S., Lanz, A. & Alford, T. L. Dec 28 2013 In : Journal of Applied Physics. 114, 24, 244903

Research output: Research - peer-reviewArticle

phosphorus
boron
activation
microwaves
annealing
4 Citations

Effective dopant activation via low temperature microwave annealing of ion implanted silicon

Zhao, Z., David Theodore, N., Vemuri, R. N. P., Das, S., Lu, W., Lau, S. S. & Alford, T. L. Nov 4 2013 In : Applied Physics Letters. 103, 19, 192103

Research output: Research - peer-reviewArticle

activation
microwaves
annealing
silicon
ions

Effect of low-temperature microwave processing and copper content on the properties of Ag-Cu thin film binary alloys

Das, S. & Alford, T. L. Apr 2013 In : JOM. 65, 4, p. 534-537 4 p.

Research output: Research - peer-reviewArticle

Binary alloys
Copper
Microwaves
Thin films
Processing
electrical property
annealing
optical property
silver
electrode

Effect of silver thickness and annealing on optical and electrical properties of Nb2O5/Ag/Nb2O5 multilayers as transparent composite electrode on flexible substrate

Dhar, A. & Alford, T. L. 2013 Materials Research Society Symposium Proceedings. Vol. 1552, p. 101-106 6 p.

Research output: ResearchConference contribution

figure of merit
electrical properties
silver
optical properties
annealing