Browsing University Center of Excellence for Photovoltaics Conference Papers by Title
Now showing items 1-20 of 59
-
18% Large Area Screen-Printed Solar Cells on Textured MCZ Silicon with High Sheet Resistance Emitter
(Georgia Institute of Technology, 2006-05)In this paper we report on high efficiency screen-printed 49 cm(2) solar cells fabricated on randomly textured float zone (1.2 Ω-cm) and magnetic Czochralski (MCz) silicon with resistivities of 1.2 and 4.8 Ω-cm, respectively. ... -
2D-Modeling and Development of Interdigitated Back Contact Solar Cells on Low-Cost Substrates
(Georgia Institute of Technology, 2006-05)Two-dimensional numerical simulations were performed to derive design rules for low-cost, high-efficiency interdigitated back contact (IBC) solar cells on a low-cost substrate. The IBC solar cells were designed to be ... -
Beneficial Impact of Low Frequency PECVD SiN(x):H-Induced Hydrogenation in High-Efficiency String Ribbon Silicon Solar Cells
(Georgia Institute of Technology, 2004-06)PECVD SiN(x):H-induced hydrogenation of bulk defects in String Ribbon Si during RTP anneal is investigated in this study to enhance the carrier lifetime and understand the role of the plasma excitation frequency and an ... -
Comparison of Dielectric Surface Passivation of Monocrystalline and Multicrystalline Silicon
(Georgia Institute of Technology, 2002-05)Reducing solar cell thickness is an attractive way to reduce material costs. However, model calculations in this paper show that if rear surface recombination velocity (S) is greater than about 1000 cm/s, a 100-μm-thick ... -
Comparison of Dielectrics and Iodine Solution for Monocrystalline and Multicrystalline Surface Passivation
(Georgia Institute of Technology, 2003-05)The effective lifetimes of monocrystalline and multicrystalline wafers were measured under dielectric and iodine-solution surface passivation using inductively coupled photoconductance. While all 18 spots measured on ... -
Comparison of Front and Back Surface Passivation Schemes for Silicon Solar Cells
(Georgia Institute of Technology, 1998-07)This work presents a comprehensive study on fast, low-cost methods for the electronic passivation of the phosphorus-diffused front surface and the non-diffused p-type rear surface of crystalline Si solar cells. Titanium ... -
A Comprehensive Study of the Performance of Silicon Screen-Printed Solar Cells Fabricated with Belt Furnace Emitters
(Georgia Institute of Technology, 2005-06)ABSTRACT: In this paper we report on the screen-printed solar cells fabricated on three types of silicon materials; float zone (FZ), HEM multicrystalline and EFG ribbon with POCl3 and belt furnace diffused emitters. The ... -
Cost and Technology Roadmaps for Cost-Effective Silicon Photovoltaics
(Georgia Institute of Technology, 2003-12)The cost of photovoltaics (PV) is expected to decrease by a factor of two to four within the next two decades, making PV an integral part of the solution to the problems of fossil fuel depletion and growing energy demand. ... -
Decade Performance of a Roof-Mounted Photovoltaic Array
(Georgia Institute of Technology, 2006-05)The Georgia Institute of Technology’s Aquatic’s Center is equipped with a 342kW roof-mounted photovoltaic array. This array will reach its ten year anniversary in July of 2006. It is therefore an appropriate time to review ... -
Determining the Sufficiency of Standard Protective Relaying for Islanding Prevention in Grid-Connected PV Systems
(Georgia Institute of Technology, 1998-07)Recently there has been a resurgence of concern about islanding of grid-connected photovoltaic (PV) systems. This condition occurs when the PV system continues to energize a section of the grid after that section has been ... -
Development of a Low Temperature Silver Paste for High Efficiency Screen-Printed Solar Cells
(Georgia Institute of Technology, 2006-09)The screen-printing technology provides a low cost high-throughput approach to good contacts for silicon solar cells. However, currently screen-printed contacts are formed at the expense of slight performance and fill ... -
Development of RIE-Textured Silicon Solar Cells
(Georgia Institute of Technology, 2000-09)A maskless plasma texturing technique using Reactive Ion Etching for silicon solar cells results in a very low reflectance of 5.4 % before and 3.9 % after SiN deposition. A detailed study of surface recombination and ... -
The Effect of the Variation in Resistivity and Lifetime on the Solar Cells Performance along the Commercially Grown Ga- and B-Doped Czochralski Ingots
(Georgia Institute of Technology, 2005-01)A systematic study of the variation in resistivity and lifetime on cell performance, before and after light-induced degradation (LID), was performed along the B- and Ga-doped Czochralski (Cz) ingots. Screen-printed solar ... -
Effective Interfaces in Silicon Heterojunction Solar Cells
(Georgia Institute of Technology, 2005-01)Thin hydrogenated amorphous silicon (a-Si:H) layers deposited by hot-wire chemical vapor deposition (HWCVD) are investigated for use in silicon heterojunction (SHJ) solar cells on p-type crystalline silicon wafers. ... -
Effective Passivation of the Low Resistivity Silicon Surface by a Rapid Thermal Oxide/PECVD Silicon Nitride Stack and Its Application to Passivated Rear and Bifacial Si Solar Cells
(Georgia Institute of Technology, 1998-07)A novel stack passivation scheme, in which plasma silicon nitride (SiN) is stacked on top of a rapid thermal SiO(2) (RTO) layer, is developed to attain a surface recombination velocity (S) approaching 10 em/s at the 1.3 ... -
Estimation of PV System Reliability Parameters
(Georgia Institute of Technology, 2001-10)In evaluating the payback time and energy price per kWh generated by a renewable energy system, the system is usually assumed to work without interruptions over its entire life. Renewable energy systems are fairly reliable, ... -
Fundamental Understanding and Implementation of Al-enhanced PECVD SiN(x) Hydrogenation in Silicon Ribbons
(Georgia Institute of Technology, 2001-06)A low-cost, manufacturable defect gettering and passivation treatment, involving simultaneous anneal of a PECVD SiN(x) film and a screen-printed Al layer, is found to improve the lifetime in Si ribbon materials from 1-10 ... -
Greater than 16% Efficient Screen Printed Solar Cells on 115-170 μm Thick Cast Multicrystalline Silicon
(Georgia Institute of Technology, 2006-05)In this paper we report on the impact of mc-Si wafer thickness on efficiency. We have obtained 16.8%, 16.4%, 16.2% and 15.7% efficient screen printed 4 cm(2) solar cells on 280 μm, 170 μm, 140 μm and 115 μm thick cast mc-Si ... -
Guidelines for More Accurate Determination and Interpretation of Effective Lifetime from Measured Quasi-Steady-State Photoconductance
(Georgia Institute of Technology, 2001-08) -
High Efficiency Mono-Crystalline Solar Cells with Simple Manufacturable Technology
(Georgia Institute of Technology, 2006-09)This paper describes the analysis and optimization of phosphorus-doped n(+) emitters for Si solar cells with screen-printed contacts to improve the uniformity of contact formation. Analysis of the simulated emitters showed ...