News

9/16/2019
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.
9/5/2019
​Dr. Erkan Aydin's technology review on "Defect and Contact Passivation for Perovskite Solar Cells" takes places in the last issue of KSC Newsletter
9/1/2019
​KPV-LAB members gathered at a dinner to say goodbye to interns and visitors.​
8/27/2019
Changes in composition are shown to affect light-harvesting layer crystallization and perovskite solar cell efficiency.
7/18/2019
​KPV-LAB hosts two summer school students for silicon solar activities​: Salman and Rawan.
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6/17/2019
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.
6/16/2019
​Jorge Avila from Prof. Henk Bolink's Group joins KPV-LAB as a visiting researcher. Welcome Jorge!​
6/11/2019
  • Reveal phase segregation in mixed-halide perovskite films via in situ observation
  • Cs+ and Rb+ additions dictate the crystallization pathways and solar cell performance
  • Direct formation of perovskite phase is beneficial in minimizing halide segregation​​
6/7/2019
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.
5/26/2019
Anand has recently moved to KAUST from India, joining Prof. Stefaan De Wolf’s group at KAUST Solar Center as a postdoctoral fellow.​
5/10/2019
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.
5/8/2019
​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.
4/17/2019
​Jingxuan Kang succesfully defended his M.Sc. thesis. Cogratulations!
4/16/2019
N-type silicon wafers exhibit superior electrical properties compared to their p-type counterparts, such as higher minority carrier lifetime and absence of light-induced degradation, resulting in a higher efficiency potential and increased reliability of photovoltaic devices. However, most of the commonly used metals (e.g., Al and Ag) cannot form an ohmic contact on the lightly doped n-type silicon wafers, retarding the development of an n-type analog to the Al-back-surface-field p-type solar cell. Herein, we present a dual-function, electron-conductive contact based on titanium nitride (TiN) for n-type silicon solar cells. By implementing the SiO2/TiN contact, which acts simultaneously as a surface passivating layer and metal electrode, an efficiency of 20% was achieved by an n-type silicon solar cell with a simplified fabrication flow. This work demonstrates the path forward to develop efficient n-type silicon solar cells with dual-function metal nitride contacts at a low cost.
4/10/2019
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.
3/31/2019
​Francesco Furlan joins to KPV-LAB perovskite solar cells team as a VSRP student
3/9/2019
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). 
3/8/2019
​KPV-LAB researchers have recently published in ACS Nano with a collaboration of Javey Research Group at the University of California, Berkeley. ​​
2/19/2019
​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).
2/10/2019
​KPV-LAB welcomes Yifan Dang as a visiting student in silicon solar cells team.​
11/24/2018
​Learn about the latest research results from KPV-LAB at the 2018 MRS Fall Meeting
11/16/2018
​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. ​
11/7/2018
​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.​​​​​​​
10/30/2018
​​Furkan recently joined Prof. Stefaan de Wolf’s group as a postdoctoral fellow.
10/24/2018
​KPV-LAB introduces new Visiting Students Research Program (VSRP) projects.
10/22/2018
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.​​
10/19/2018
​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.​
10/8/2018
The efficiency of solar cells can be increased by thin-film contacts developed by researchers at KAUST.​
10/1/2018
​KPV-LAB members are joining PSCO-2018 Conference at Lausanne​
9/16/2018
​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.

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9/9/2018
KPV-LAB researchers fabricated the first silicon heterojunction solar cells at KAUST Solar Center with impressive start of >20%.​​
7/31/2018
Thomas Allen​ reviewed passivating contacts which is enabling progress towards the efficiency limits of the silicon solar cells. ​
7/31/2018
​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.
7/23/2018
​Indeotec Octopus PECVD-PVD Cluster enables the fabrication of silicon heterojunction cells on the 6-inch wafers.​
4/19/2018
Tantalum Nitride has been used for the first time as a passivating contact on silicon solar cells.​
1/16/2018
KAUST Solar Center has a New Milestone​: KPV-LAB researchers have recently achieved >20% efficiency for perovskite solar cells 
5/30/2017
Xinbo Yang's paper selected as a front cover in journal of "Progress in Photovoltaics: Research and Applications"  ​​