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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Alloys and Compounds for Thermoelectric and Solar Cell Applications VIII
Presentation Title Transmission Electron Microscopy Study of Hole-selective Contacts Employed in Silicon Solar Cells
Author(s) Haider Ali, Geoffrey Gregory, Kristopher O Davis
On-Site Speaker (Planned) Haider Ali
Abstract Scope Molybdenum oxide (MoOx) and tungsten oxide (WOx) are often employed as hole-selective contacts in crystalline silicon (c-Si) solar cells. Typically, ultra-thin (<10 nm) MoOx/ WOx is sandwiched between a-Si:H(i)/SiO2 (< 5 nm) passivation layer and either a transparent conducting oxide (e.g. indium tin oxide) or a metal contact (e.g. Al, Ni). The resulting contact structures not only provide efficient hole-selectivity but also results in very low surface recombination and minimal optical parasitic absorption. However, such contacts are sensitive to low temperature (≈ 200C) anneal resulting in loss of cell efficiencies. To understand the origin of these losses, nanoscale characterization of these contact structures was performed with the help of transmission electron microscopy (TEM). It emerged that high-resolution TEM (HRTEM) imaging in combination with analytical TEM techniques (i.e. EDS, EELS) can be employed to detect the formation of interlayers as well as any elemental diffusion occurring within such contact structures.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Ab-initio Study of TiMSn (M= Ni, Pt, Pd) Alloys using the CRYSTAL Ab-initio Package.
Ab initio Calculations of Thermoelectric Materials
Accelerated Discovery of Efficient Solar-cell Materials using Quantum and Machine-learning Methods
Approaches to Manipulate p-n Conduction Transition and High Thermoelectric Performance in Ga-incorporated Bi2Te3
Assessment of Interface in Bi2Te3 and Sb2Te3 Thin Film Thermoelectric Modules
Black Phosphorus and Semiconducting Transition Metal Dichalcogenides in Contact with Transparent Conductive Oxides for High Efficiency Solar Cells
Current Progress on Fabrication and Life Testing of Advanced Skutterudite Thermoelectric Materials in a Proposed Enhanced Multi-mission Radioisotope Thermoelectric Generator (eMMRTG) for Space Power Applications
D-4: Assessment of Co-P Diffusion Barrier for Bismuth Telluride-based Thermoelectric Materials
D-6: Phase Diagram of Bi-Cu-Te and Thermoelectric Properties of Cu Doped Bi2Te3 Alloys
D-7: Phase Diagrams of Ag-Pb-Sn-Te System
D-8: Realizing the Microstructure in GeTe-based Thermoelectric Materials and Phase Transition Behavior
D-9: Thermoelectric Properties of Multiply Doped Mg3(Sb, Bi)2
Defect Formation Energies and Effective Masses in the Mg2(Si,Sn) Solid Solutions via DFT Calculations
Enhanced Averaged zT in n-type Bi2Te3 via Solubility Control
Gradient Composition Layered Microstructure Development in Thermoelectric Mg2(Si,Sn) Alloys Based on Phase Equilibrium
Heat Stability of Mg2Si1-xSnx as Affected by Heat Treatment Temperature and Duration
High Reliability Package of Perovskite Solar Cell by SiNx Passivation Layer with Sn-Bi-In Low-melting Solder
Interfacial Reactions Between Bi2Te3 Substrate with Cu, In, Sn and Ni
Laser Additive Manufacturing of Bismuth Telluride and Silicide Thermoelectric Materials
Lattice Hardening Due to Vacancy Diffusion in (GeTe)mSb2Te3 Alloys
Minor Ga Addition in β-Zn4Sb3 Leads to Major Enhancement in Thermoelectric Performance
Multi-band Electronic and Thermal Transport in Fe2VAl Based Full Heusler Thin Films
Novel Thermoelectric Materials for Power Generation
Optimization of Thermoelectric Performance of Nitrogen- and Boron-doped Carbon Nanotubes
Optimizing Power Factor in Rare Earth-free CoSb3-Skutterudite Thin Films
Phase Diagrams of Ag-Cu-Te Ternary System and Ag2Te/Cu Interfacial Reaction
Polar Tintermetallics as High Temperature Thermoelements
Portable Nanostructured Magneto-Thermoelectric Bi-Sb Alloys at Cryogenic Temperatures
Realizing the Compositional Homogeneity in GeTe-based Thermoelectric Materials and Phase Transition Behavior
Severe Plastic Deformation (SPD) via High Pressure Torsion (HPT) a Perfect Tool not Only to Enhance ZT of Thermoelectric Materials but Also to Produce Them
Synthesis, Processing and Characterizations of Functional Materials for Industrial Applications
Thermal Storage Effect on Thermoelectric Module
Thermoelectric Films Deposited by Pulsed Magnetron Sputtering
Thermoelectric Half Heusler Systems {Nb,Ta}FeSb - Ti1+xFe1.33-xSb
Thermoelectric Properties of p-type Mg Doped CuMO2 Delafossite Thin Films and Modules
Transmission Electron Microscopy Study of Hole-selective Contacts Employed in Silicon Solar Cells
Using Energy Filtering to Change the Thermoelectric Design Paradigm
Utilizing Magnetism and Dilute Magnetic Semiconductors to Enhance Thermoelectric Performance

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