27 September, 2021
Luis Victor Torres is a PhD student. He arrived in Kaust in 2019 and studied for his master's degree with Prof. Derya Baran. His research interests are interface engineering on tandem solar cells, particularly interconnecting layers in monolithic tandem photovoltaics.
19 September, 2021
In the latest work, Dr. Waseem Raja and his colleagues develop a novel 3-D opto-electrical finite-element model to analyze the performance of ultrathin solar cells. Overall, the study shows how 3-D finite element modeling can aid in analyzing and developing new optical and electrical solar cell designs for ultra-thin solar cells such as those based on chalcogenides and perovskites.
04 September, 2021
In collaboration with LAMA, OMEGA, CPMS, and UFD groups of KAUST, we have shown that phenformin hydrochloride (PhenHCl), a multifunctional molecule that plugs various atomic-scale defects in perovskite solar materials, can significantly boost the longevity and electrical output of perovskite-based solar cells.
16 August, 2021
In his latest work, Dr. De Bastiani led the KPVLAB team, in collaboration with the University of Toronto and the EPFL, through a six-month outdoor performance study of bifacial perovskite/silicon tandems in the sunny and humid desert of Saudi Arabia.
01 July, 2021
Dr. Erkan Aydin and his colleagues from KPV-LAB built an n-i-p monolithic tandem solar cell with a power conversion efficiency of 27%, beating out the previous best-reported value of 22% in the same configuration.
20 June, 2021
This review addresses the current progress in photon recycling in PSCsfollowed by analysis the various light-trapping strategies and device architectures that could yield efficient photon recycling in PSCs.
30 May, 2021
Ohoud K. Alharbi is a MS student working in first-principles calculations and simulations with Prof. Udo Schwingenschlögl. Now, she joins KPV-LAB as a visiting student. Welcome, Ohoud!
04 March, 2021
Fuzong Xu's study on KSCN additive for slot-die coated MAPbI3 films enables 11 μm grains and 25.15 μm charge carrier diffusion length. On thick films, the scalable solar cells achieve 21.38% PCE with negligible hysteresis.
18 January, 2021
Maxime Babics is currently a postdoctoral fellow at KAUST working on scaling-up efficient and stable tandem devices. His research interest are silicon heterojunction solar cells, perovskite/silicon tandem solar cells, scalable photovoltaics, and organic interlayers
17 September, 2020
We performed outdoor field testing of perovskite/silicon tandem solar cells in a sunny climate and found that the ideal bandgap of the perovskite absorber in the perovskite/silicon tandems should be lower than previously predicted values, which is good news to fabricate phase-stable perovskites.
25 May, 2020
A recent study by Dr. Jiang Liu came out in the recent issue of ACS Appl. Mater. Interfaces report molecular doping of hole transport materials which improves the performance and stability of the perovskite solar cell. To read more check out the publication!
15 April, 2020
Emerging perovskite/silicon tandem solar cells are showing better performances on textured silicon bottom cells. On these devices, conformal coated sputtered nickel oxide hole transport layers promise highly-efficient tandems. To learn more, read the recent technology review by Dr. Erkan Aydin from KPV-LAB.
09 March, 2020
Mechanically stacked tandems still hold great potential. Check out our collaborative study with Sargent Group reporting lab-scale 28.2% perovskite/silicon tandems with 19% semitransparent top cells published in Nature Communications.
05 March, 2020
Our team in a collaboration with Sargent Group grew thick films of perovskite with a bandgap of ∼1.68 electron volts and used a passivant, 1-butanethiol, to limit its phase separation. The tandem cells had a certified power conversion efficiency of 25.7% and had negligible losses after 400 hours of operation.
23 January, 2020
KPV-LAB offers students the chance to conduct innovative research at KAUST. With research opportunities that span the breadth of the photovoltaics field, driven students with an insatiable curiosity and strong academic performance can gain unparalleled opportunities to pursue their research questions under the guidance and support of KPV-LAB members.
16 September, 2019
Recent breakthroughs in the way silicon solar cells can be made suggest the face of the industry-dominating technology could be changing. The new discoveries are outlined in a paper.
01 September, 2019
KPV-LAB members gathered at a dinner to say goodbye to interns and visitors. Francesco Furlan who is a VSRP intern, Jorge Avila Gomez who is a visiting scientist from the University of Valencia, and Salman Aboud and Rawan Jalmood are finalizing their visits.
In the meantime, we say welcome to our new VSRP interns Alessandro Mirabelli and Shingis Zhumagali.
17 June, 2019
The role of cation and halide mixing is revealed using in situ X‐ray scattering measurements during spin‐coating. Modulating the cation/halide composition directly impacts the lifetime of the sol–gel precursor film and its easy and reproducible conversion to the perovskite phase to yield solar cells with 20% power conversion efficiency.
11 June, 2019
07 June, 2019
This paper envision a future with ∼10 TW of PV by 2030 and 30 to 70 TW by 2050, providing a majority of global energy. PV would be not just a key contributor to electricity generation but also a central contributor to all segments of the global energy system. Ramifications and challenges for complementary technologies (e.g., energy storage, power to gas/liquid fuels/chemicals, grid integration, and multiple sector electrification) are discussed.
10 May, 2019
The small organic molecule (2‐(1,10‐phenanthrolin‐3‐yl)naphth‐6‐yl)diphenylphosphine oxide is explored as cathode interfacial material to reduce the extraction barrier between phenyl‐C61‐butyric acid methyl ester and Ag. With the better contact quality thanks to this molecule, both opaque and semitransparent p‐i‐n perovskite solar cell achieve improved performance and stability.
08 May, 2019
Dr. Erkan Aydin, Dr. Michele De Bastiani and Prof. Stefaan De Wolf reviewed "Defect and Contact Passivation for Perovskite Solar Cells" in Advanced Materials. This comprehensive review explains the origin of the various voltage‐limiting mechanisms in PSCs, and possible mitigation strategies with decent examples from literature.
16 April, 2019
In this study, Xinbo Yang coworkers report an electron-conductive, hole-blocking contact based on titanium nitride (TiN) deposited by reactive magnetron sputtering.
10 April, 2019
In this study, Dr. Erkan Aydin and coworkers show the excellent properties of Zr‐doped indium oxide (IZRO) transparent electrodes for such applications, with improved near‐infrared (NIR) response, compared to conventional tin‐doped indium oxide (ITO) electrodes, are shown. By doing so, the team is reporting 26.2% PCE for four‐terminal perovskite/silicon tandem devices with an absolute 3.5 mA cm−2 short‐circuit current improvement in silicon bottom cells.
09 March, 2019
This study reveals the temperature dependence of absorption spectra for methylammonium lead iodide with specific attention for its sub-bandgap
absorption edge (often referred to as Urbach energy).
19 February, 2019
This study reports the first-principles calculations based on density functional theory to investigate the surface defect and metal-induced gap state density of silicon in close contact with metals (Al and Ag).
16 November, 2018
Charge accumulation at the electron and hole transport layers generates anomalous electrical behavior in perovskite solar cells (PSCs). Hysteresis in the current-voltage characteristic and recombination at the interfaces are the clearest manifestations of this phenomenon, which compromises device performance and stability. In this study, we explained the underlying charge‐carrier dynamics of a hysteresis observed and hysteresis-free PSCs by analyzing their transient photocurrent response.
07 November, 2018
The Eni Award aims to reflect the importance of scientific research and innovation, promoting a better use of energy sources and encouraging a new generation of researchers. The award is an international point of reference for research in the energy and environment sectors.
22 October, 2018
Jiang's current research interests include the development of high-efficiency perovskite/silicon tandem solar cells, perovskite solar cells based on novel materials including evaporation processing, interface passivation, and advanced characterization.
19 October, 2018
KPV-LAB researchers developed a room temperature sputtered Nickel oxide (NiOx) hole transport thin films which can be used for perovskite solar cells, perovskite/silicon tandem solar cells, organic solar cells which employs low-temperature resilience substrates.
16 September, 2018
Thanks to PMMA: PCBM Double-side passivation, very high‐efficiency (≈20.8%) perovskite cells with some of the highest open circuit voltages (1.22 V) reported for the same 1.6 eV bandgap are demonstrated.
31 July, 2018
High-efficiency silicon heterojunction (SHJ) solar cells (Fig. 1), which use a crystalline silicon (c-Si) wafer as an optical absorber and thin-film layers to form their electrical contacts, have the potential to gain a substantial share in the commercial photovoltaic (PV) market in the future. Currently, the world-record efficiency of 26.7 % is achieved with SHJ technology by placing both contacts in an interdigitated back-contact design. The KAUST Photovoltaics (KPV) Lab, led by Prof. Stefaan De Wolf, which is part of the KAUST Solar Center (KSC), is dedicated to the development of high-efficiency silicon-based solar cells, using SHJ solar cells as a core technology, and to tailoring such solar cells specifically for use in hot and sunny climates.