Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Alternative materials are of interest for the fabrication of thin film solar cells since they could offer potential enhancements for high efficiency devices. Cd1-xZnxS is such a material. In this preliminary study, structural and optical properties of films deposited by chemical bath deposition (CBD) for the two main…
Supercapacitors are energy storage elements, which could generally replace, or hybridized with electrochemical batteries. However, considering the properties of state-of-the-art devices, a designer could look at them as more useful components in a multitude of other applications. General properties of supercapacitors…
Backside contacted cells were fabricated on p- and n-type, liquid phase crystallized silicon on glass. The heterojunction emitter and transparent contacting layer were opened locally using an inkjet printer and the absorber was contacted with laser fired point contacts. An analytical resistance model was derived to de…
Development of transparent conducting oxides on a flexible non-transparent substrate is described. We compared Hall effect results on unit films with results from a new Hall measurement procedure for characterization of TCO material on full stack devices. Hall mobility of films 300-400 nm thick was 15 cm2/Vs on full s…
We report on voltage-bias annealing (VBA) experiments performed on CIGS and CZTSe solar cells. In these experiments, completed devices were annealed at moderate temperatures and subsequently quenched with continuously applied voltage bias. These treatments resulted in substantial reversible changes in device character…
We report the growth of CuInSe2nanowires (NWs) using an evaporation process. The NWs grow on top of an underlying CuInSe2polycrystalline layer that initially forms on Si(100) substrates with native SiO2. Reference samples grown after removal of the native oxide do not exhibit the formation of NWs. The polycrystalline…
We present a TCAD simulation deck for Cu2ZnSnS4(CZTS) solar cells that is calibrated to data from the best reported experimental device structure: the wherewithal for future predictive device modeling. The calibration is performed by matching the experimental external quantum efficiency (EQE) and current density vs. v…
Reducing fabrication costs is a major driving force in photovoltaic research. Atmospheric processes such as spin coating, spraying or printing are being developed to reduce the cost/Wp of CIGS, CZTS and perovskite solar technologies. For all technologies, surface cleaning and activation prior to thin film deposition i…
The swirl defect is observed in both n-type Czochralski (Cz) and non-contact crucible (NOC) Si wafers. It is postulated to be the outcome of oxygen precipitation during crystal growth and/or post-growth high temperature processes, specifically processes involving temperatures in the range of 800°C-1000°C. This defect…
High rate pulsed DC magnetron sputtering has been used to fabricate thin film CdTe photovoltaic devices. Fabrication of thin film photovoltaic devices using magnetron sputtering has the advantages of excellent coating uniformity and use of lower substrate temperatures during deposition. The CdTe and CdS layers were de…
The design of a double-layer absorber consisting of silicon carbide (SiC) and molecular sieves layer has been performed. The microwave absorbing characteristics of an individual-layer molecular sieves and proposed double-layer absorber are investigated by simultaneously considering the effects of various moisture cont…
In novel photovoltaic absorbers, it is often difficult to assess the root causes of low open-circuit voltages, which may be due to bulk recombination or sub-optimal contacts. In the present work, we discuss the role of temperature- and illumination-dependent device electrical measurements in quantifying and distinguis…
As solution-processed organic-inorganic perovskite solar cells continue to climb, reports of device instability and variability have motivated fundamental studies of microscale inhomogeneities in these materials. In this work, we study device-relevant CH3NH3PbI3perovskite films using cathodoluminescence in scanning tr…
An improved model of copper p-type doping in CdTe absorbers is proposed that accounts for the mechanisms related to tightly bound Cu(i)-Cu(Cd) and Cd(i)-Cu(Cd) complexes that both limit diffusion and cause self-compensation of Cu species. The new model explains apparent discrepancy between DFT-calculated and fitted di…
This work investigates 2.05 eV bandgap (Al)GaInP alloys for use as the top junction of IMM solar cells. We explore balancing alloy composition and lattice constant as two complementary variables to achieve the target bandgap in one material system. Here both MBE and MOCVD growth methods are compared to achieve this go…
We investigate the dominant recombination process in CZTS thin film absorber layers by time-resolved and steady state photoluminescence spectroscopy at low temperatures. We show that the emission peak at low temperatures shifts monotonically over many orders of magnitude of excitation power, which is inconsistent with…
Formation of boron (B) emitter and phosphorus back surface field (BSF) is a major challenge in mass production of low-cost and high efficiency n-type Si solar cells. This paper reports on the successful mass production of industrially cost-effective 239cm2n-type Si solar cells. Conventional BBr3 thermal diffusion form…
An R&D-scale hollow cathode sputtering (HCS) system has been designed and built at NJIT. It operates in reactive mode using metal targets and can deposit virtually any metal oxide. We survey the use of metal oxide layers in thin film PV and report the preparation by HCS of several oxides including ZnO, ZnO:Al (AZO), Z…
The configurations, stabilities, electronic, and magnetic properties of Fe n Au ( n = 1−12) clusters are investigated systematically by using the relativistic all-electron density functional theory with the generalized gradient approximation. The substitutional effects of Au in Fe n +1 ( n = 1, 2, 4, 5, 10−12) cluster…
Abstract We have constructed an apparatus we call ‘Buildup Minimizing Assembly’ (BMA), which can be used to achieve narrow beam, good geometry characteristics in γ -ray attenuation measurements, thus minimizing the buildup contribution. The apparatus is easy to construct and can be implemented in undergraduate laborat…