60 citations · 205 across the 31 of their papers we have counts for
32 papers
Foundry-Fabricated Silicon Nitride Grating Arrays with Uniform Power Distribution at Visible Wavelengths
Amged Alquliah, Xiaoxin Wang, Jifeng Liu +1
Multiplexed optical biosensors are widely deployed to read out many biological targets in parallel. However, their channel count and integration density are limited by the photonic…
Investigation of GeSn aspect ratio trapping growth up to 8% Sn
Hryhorii Stanchu, Quang Minh Thai, Fernando M. de Oliveira +10
Aspect ratio trapping (ART) growth of germanium-tin (GeSn) is a promising approach to target important objectives on the quest towards commercialization of complementary metal-oxid…
Study of GeSn Selective Area Growth with Demonstration of SWIR Light Detection
Hryhorii Stanchu, Quang Minh Thai, Rajesh Kumar +16
As germanium-tin (GeSn) epitaxial growth quality continuously improves, the search for an efficient integration strategy of GeSn optoelectronics devices into complementary metal-ox…
Thin film synthesis of SrZn2P2 with SrI2 post-annealing for enhanced crystallinity and optoelectronic quality
Sita Dugu, Shaham Quadir, Christopher P. Muzzillo +11
Ternary Zintl phosphides are promising light-absorbing semiconductors for thin-film optoelectronic applications, but strategies for controlling their microstructure and optoelectro…
Germanium-tin (GeSn) avalanche photodiode with up to 2.7 micro cutoff wavelength for extended SWIR detection
Quang Minh Thai, Rajesh Kumar, Justin Rudie +11
Separate absorption charge multiplication germanium tin on silicon avalanche photodiode offers a viable solution to achieve CMOS compatible, high sensitivity detection technology i…
Long photoexcited carrier lifetime in a stable and earth-abundant zinc polyphosphide
Zhenkun Yuan, Genevieve Amobi, Shaham Quadir +16
Halide perovskites have revolutionized optoelectronics by demonstrating that long carrier lifetime can be achieved in materials processed in relatively uncontrolled environments, w…
Alloying to Tune the Bandgap of the AM2Pn2 Zintl Compounds
Andrew Pike, Zhenkun Yuan, Muhammad Rubaiat Hasan +6
The AM2Pn2 Zintl compounds are a large class of semiconductor materials that have a wide range of bandgaps and are mostly stable in the same crystal structure. Representative compo…
CaCdP: A Visible-Light Absorbing Zintl Phosphide Stable under Photoelectrochemical Water Oxidation
Guillermo L. Esparza, Zhenkun Yuan, Muhammad Rubaiat Hasan +9
A key bottleneck to solar fuels is the absence of stable and strongly absorbing photoelectrode materials for the oxygen evolution reaction (OER). Modern approaches generally trade…
Ge0.95Sn0.05 on Si avalanche photodiode with Spectral Response Cutoff at 2.14 micrometer
Justin Rudie, Xiaoxin Wang, Rajesh Kumar +9
GeSn-based avalanche photodiode (APD) operating in shortwave infrared (SWIR) wavelength was demonstrated in this work. A separate absorption and charge multiplication (SACM) struct…
BaCd2P2: a promising impurity-tolerant counterpart of GaAs for photovoltaics
Gideon Kassa, Zhenkun Yuan, Muhammad R. Hasan +5
BaCd2P2 (BCP) has been recently identified as a new solar absorber with promising optoelectronic properties. This work demonstrates that, despite having a low precursor purity (98.…
Semiconductor-compatible topological digital alloys
Yunfan Liang, Damien West, Shunda Chen +3
Recently, GeSn alloys have attracted much interest for direct-gap infrared photonics and as potential topological materials which are compatible with the semiconductor industry. Ho…
A Map of the Zintl AM2Pn2 Compounds: Influence of Chemistry on Stability and Electronic Structure
Andrew Pike, Zhenkun Yuan, Gideon Kassa +9
The AM2Pn2 (A= Ca, Sr, Ba, Yb, Mg; M= Mn, Zn, Cd, Mg; and Pn=N, P, As, Sb, Bi) family of Zintl phases has been known as thermoelectric materials and has recently gained much attent…
Atomic short-range order: a new degree of freedom for band engineering of GeSn semiconductor alloys
Shang Liu, Yunfan Liang, Nirosh M. Eldose +18
Chemical short-range order (SRO) in alloys denotes the statistical preference or avoidance between atomic species on neighboring lattice sites. Here, we highlight SRO as a powerful…
Low-Temperature Synthesis of Stable CaZnP Zintl Phosphide Thin Films as Candidate Top Absorbers
Shaham Quadir, Zhenkun Yuan, Guillermo Esparza +14
The development of tandem photovoltaics and photoelectrochemical solar cells requires new absorber materials with band gaps in the range of ~1.5-2.3 eV, for use in the top cell pai…
Monolithic Germanium Tin on Si Avalanche Photodiodes
Justin Rudie, Sylvester Amoah, Xiaoxin Wang +8
We demonstrate monolithically grown germanium-tin (GeSn) on silicon avalanche photodiodes (APDs) for infrared light detection. A relatively thinner Ge buffer design was adopted to…
Significant Photoluminescence Improvements from Bulk Germanium-Based Thin Films with Ultra-low Threading Dislocation Densities
Liming Wang, Gideon Kassa, Jifeng Liu +1
Bulk Ge crystals, characterized by significantly lower threading dislocation densities than their epitaxial counterparts, emerge as optimal candidates for studying and improving Ge…
FeMnNiAlCr High Entropy Alloys with High-Efficiency Surface Oxide Solar Absorbers for Concentrating Solar Power Systems
Xiaoxue Gao, Edwin Jiang, Andrew Pike +8
High entropy alloys (HEAs) have attracted substantial interest in recent years. Thus far, most investigations have focused on their applications as structural materials rather than…
Native point defects in HgCdTe infrared detector material: Identifying deep centers from first principles
Wei Chen, Gian-Marco Rignanese, Jifeng Liu +1
We investigate the native point defects in the long-wavelength infrared (LWIR) detector material HgCdTe using a dielectric-dependent hybrid density functional com…
Discovery of the Zintl-phosphide BaCdP as a long carrier lifetime and stable solar absorber
Zhenkun Yuan, Diana Dahliah, Muhammad Rubaiat Hasan +17
Thin-film photovoltaics offers a path to significantly decarbonize our energy production. Unfortunately, current materials commercialized or under development as thin-film solar ce…
Ultrafast CMOS image sensors and data-enabled super-resolution for multimodal radiographic imaging and tomography
Xin Yue, Shanny Lin, Wenting Li +11
We summarize recent progress in ultrafast Complementary Metal Oxide Semiconductor (CMOS) image sensor development and the application of neural networks for post-processing of CMOS…
Spinel Cu-Mn-Cr Oxide Nanoparticle-Pigmented Solar Selective Coatings Maintaining >94% Efficiency at 750 degrees C
Can Xu, Xiaoxin Wang, Jifeng Liu
High-temperature concentrating solar power (CSP) system is capable of harvesting and storing solar energy as heat towards cost-effective dispatchable solar electricity. Solar selec…
Extracting optical parameters of Cu-Mn-Fe spinel oxide nanoparticles for optimizing air-stable, high-efficiency solar selective coatings
Xiaoxin Wang, Can Xu, Jifeng Liu
High-temperature Cu-Mn-Fe spinel-oxide nanoparticle solar selective absorber coatings are investigated experimentally and theoretically. A reliable, general approach to evaluate ab…
Synergistic Photon Management and Strain-Induced Band Gap Engineering of Two-Dimensional MoS2 Using Semimetal Composite Nanostructures
Xiaoxue Gao, Sidan Fu, Tao Fang +6
2D MoS2 attracts increasing attention for its application in flexible electronics and photonic devices. For 2D material optoelectronic devices, light absorption of the molecularly…
3D Nanoscale Mapping of Short-Range Order in GeSn Alloys
Shang Liu, Alejandra Cuervo Covian, Xiaoxin Wang +5
GeSn on Si has attracted much research interest due to its tunable direct bandgap for mid-infrared applications. Recently, short-range order (SRO) in GeSn alloys has been theoretic…