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Dennis THORBOURN | Cited by 122 | of NASA, DC | Read 21 publications | Contact Dennis THORBOURN
Biography. Dennis O. Thorburn is a member of JPL’s RAD Group and IEEE, contributing to the assurance of spacecraft/EEE parts and materials for JPL/NASA Missions and industry partners over the past 20 years. Lead Engineer at the Dynamitron Accelerator Lab, supporting unprecedented Missions and R&TD efforts to characterize the performance of ...
Also published under: D. Thorbourn, Dennis O. Thorbourn, D. O. Thorbourn Affiliation Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
- Introduction
- Results and Discussion
- Experimental
- Conclusions
- Author Contributions
- Acknowledgements
Solar cells are an important power source for enabling non-nuclear exploration of the solar system. Solar cells supply constant, renewable power to a space mission vehicle and its payload when in sight of the sun, allowing for sustained travel to the outer reaches of the solar system. State-of-the-art (SOA) space solar arrays use triple-junction so...
Specific power of a perovskite solar array
The specific power of a solar cell is especially important for space applications where the weight of payloads is a serious consideration. Gdoutos et al.21 from Caltech have developed a lightweight 1.7 m × 1.7 m prototype solar array structure with areal density of 150 g m−2. This array structure is designed to be scalable up to 60 m × 60 m. At this size, it is estimated to have an areal density of 50 g m−2 because areal density decreases for larger structures.21 Because perovskite solar cell...
Perovskite solar cell structure
Perovskites are a group of compounds that have the same ABX3 crystal structure as the mineral perovskite (calcium titanate – CaTiO3). In a typical perovskite solar cell, the A site has a large cation such as methylammonium (MA), formamidinium (FA), cesium (Cs), rubidium (Rb), or a combination of these. The B site is a smaller cation such as lead (Pb) or tin (Sn). The X site balances the charge with one or more of the halides iodine (I), bromine (Br), or chlorine (Cl).19 Since 2012, when the f...
Low-intensity low-temperature (LILT) measurement conditions
To simulate the solar cell operation in deep space, we tested PSCs at various mission-relevant temperatures ranging from 28 °C to −170 °C and light intensities based on the solar irradiance from 1.0 AU to 30.0 AU. Table 1 details the solar light intensities, temperatures, and radiation dose rates at the distances of Earth and the outer planets. Solar light intensity is inversely proportional to the square of distance and is calculated by dividing the value of the solar constant, 1367 W m−2, b...
ANU cell fabrication
The indium tin oxide (ITO) substrates were sequentially cleaned in detergent, acetone, isopropyl alcohol and ethyl alcohol for 20 min in an ultrasonic bath, and then dried with nitrogen. Cleaned ITO substrates were exposed to approximately 30 min of UV–O3 treatment before the subsequent deposition step. ∼15 nm nickel oxide thin films were deposited on the pre-cleaned ITO substrates by radiofrequency magnetron sputtering at 150 W and 18 sccm Ar and 2 sccm O2 gas using a nickel oxide target und...
Caelux cell fabrication
Patterned ITO glass substrates with sheet resistance of 15 Ohm sq−1 were cleaned in soap water, DI water, Acetone and then isopropyl alcohol for 15 min respectively, followed by 15 min treatment in UV ozone. NiO of 20 nm were deposited by a RF sputter at 120 W and then annealed in N2/H2 (95/5) at 350 °C for 10 min. After cooling down to room temperature, NiO-coated substrates were transferred into N2-filled glovebox. Perovskite precursor of 1.3 M Cs0.09FA0.8MA0.11Pb(I0.95Br0.05)3 was dissolve...
Light current density–voltage measurements
Light J–V measurements were taken at JPL using the Spectrolab X-25 Mk II Solar Simulator. The measured cells were held in vacuum and light J–V measurements were taken while varying light intensity and temperature. To record the operating temperature of each individual cell tested, a thermocouple was attached to the back of each cell. The bulb light intensity was adjusted for different measurements to correspond to the solar intensity at distances from the sun of 1.0 AU, 5.5 AU, 9.5 AU, 19.2 A...
We have conducted a study of two different types of PSCs in lab-controlled deep space conditions across a wide temperature and light intensity range. The PSCs have different structural compositions, and thus respond differently to light intensity and temperature. The Caelux PSCs start off with a higher efficiency of 19.4% at 1.0 AU and 28 °C compar...
T. C. contributed to conceptualization, data curation and analysis, experimental procedures, and writing. J. P., Y. W., J. H., A. D. B., D. N., and H. T. N. contributed to cell fabrication and material characterization. M. K., C. M., and R. K. contributed to cell characterization and experimental measurements. D. T., W. K., and J. B. contributed to...
The author would like to thank Joel Schwartz for helpful discussions. This research was carried out at The Australian National University, Caelux Corporation, the California Institute of Technology, and the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (80NM0018D...
Dennis O. Thorbourn. Producer: Jamaica Beat. Dennis O. Thorbourn is known for Jamaica Beat (1997).
- Producer
- Dennis O. Thorbourn
Perovskite solar cells (PSCs) are studied in low-intensity low-temperature (LILT) conditions before and after low energy proton irradiation to characterize device performance at deep space mission-relevant light intensities and temperatures. Download : Download high-res image (712KB)
a unique capability to test high-energy radiation effects on spacecraft materials outgassing in support of missions to the Jovian system. The JPL Radiation Induced Outgassing Test (RIOT) facility...
