About

Remy Wang is an Assistant Professor of Computer Science at UCLA Samueli School of Engineering. His research focuses on the optimization of modern data systems using advanced techniques from programming languages and databases. Wang has contributed to the field through notable publications on topics such as Datalog, recursive queries, relational e-matching, and tensor graph superoptimization. He earned his PhD in 2023 from the University of Washington in Computer Science & Engineering. Wang has received several awards, including the PODS Best Paper Award in 2022, the OOPSLA Distinguished Paper Award in 2021, and the POPL Distinguished Paper Award in 2021, among others.

Research topics

• Chemistry
• Materials science
• Organic chemistry
• Optoelectronics
• Chemical engineering
• Composite material
• Crystallography
• Nanotechnology
• Inorganic chemistry

Selected publications

• A Well‐Mixed Phase Formed by Two Compatible Non‐Fullerene Acceptors Enables Ternary Organic Solar Cells with Efficiency over 18.6%

  Advanced Materials · 2021 · 454 citations

  • Materials science
  • Optoelectronics
  • Chemical engineering

  The ternary strategy, introducing a third component into a binary blend, opens a simple and promising avenue to improve the power conversion efficiency (PCE) of organic solar cells (OSCs). The judicious selection of an appropriate third component, without sacrificing the photocurrent and voltage output of the OSC, is of significant importance in ternary devices. Herein, highly efficient OSCs fabricated using a ternary approach are demonstrated, wherein a novel non-fullerene acceptor L8-BO-F is designed and incorporated into the PM6:BTP-eC9 blend. The three components show complementary absorption spectra and cascade energy alignment. L8-BO-F and BTP-eC9 are found to form a homogeneous mixed phase, which improves the molecular packing of both the donor and acceptor materials, and optimizes the ternary blend morphology. Moreover, the addition of L8-BO-F into the binary blend suppresses the non-radiative recombination, thus leading to a reduced voltage loss. Consequently, concurrent increases in open-circuit voltage, short-circuit current, and fill factor are realized, resulting in an unprecedented PCE of 18.66% (certified value of 18.2%), which represents the highest efficiency values reported for both single-junction and tandem OSCs so far.

  DOI

• Reconfiguring the band-edge states of photovoltaic perovskites by conjugated organic cations

  Science · 2021 · 319 citations

  • Chemistry
  • Inorganic chemistry
  • Materials science

  (A, usually a monovalent organic cation; B, a divalent cation; and X, a halide anion) are constructed mainly of the orbitals from B and X sites. Hence, the structural and compositional varieties of the inorganic B-X framework are primarily responsible for regulating their electronic properties, whereas A-site cations are thought to only help stabilize the lattice and not to directly contribute to near-edge states. We report a π-conjugation-induced extension of electronic states of A-site cations that affects perovskite frontier orbitals. The π-conjugated pyrene-containing A-site cations electronically contribute to the surface band edges and influence the carrier dynamics, with a properly tailored intercalation distance between layers of the inorganic framework. The ethylammonium pyrene increased hole mobilities, improved power conversion efficiencies relative to that of a reference perovskite, and enhanced device stability.

  DOI

• Cathode engineering with perylene-diimide interlayer enabling over 17% efficiency single-junction organic solar cells

  Nature Communications · 2020 · 755 citations

  • Materials science
  • Optoelectronics
  • Chemical engineering

  In organic solar cells (OSCs), cathode interfacial materials are generally designed with highly polar groups to increase the capability of lowering the work function of cathode. However, the strong polar group could result in a high surface energy and poor physical contact at the active layer surface, posing a challenge for interlayer engineering to address the trade-off between device stability and efficiency. Herein, we report a hydrogen-bonding interfacial material, aliphatic amine-functionalized perylene-diimide (PDINN), which simultaneously down-shifts the work function of the air stable cathodes (silver and copper), and maintains good interfacial contact with the active layer. The OSCs based on PDINN engineered silver-cathode demonstrate a high power conversion efficiency of 17.23% (certified value 16.77% by NREL) and high stability. Our results indicate that PDINN is an effective cathode interfacial material and interlayer engineering via suitable intermolecular interactions is a feasible approach to improve device performance of OSCs.

  DOI

Frequent coauthors

• Yang Yang

  Jilin University

  193 shared

• Jingjing Xue

  116 shared

• Tianyi Huang

  Carnegie Mellon University

  111 shared

• Yepin Zhao

  University of California, Los Angeles

  99 shared

• Shaun Tan

  96 shared

• Chunfeng Zhang

  Collaborative Innovation Center of Advanced Microstructures

  89 shared

• Yongfang Li

  Institute of Chemistry

  86 shared

• Min Xiao

  Collaborative Innovation Center of Advanced Microstructures

  72 shared

Labs

• UCLA Samueli School Of EngineeringPI

Education

• PhD, Materials Science and Engineering

  UCLA

  2019

• Master, Materials Science and Engineering

  UC Berkeley

  2016

• Bachelor, Materials Science and Engineering

  Jilin University

  2015

Awards & honors

• PODS Best Paper Award, 2022
• OOPSLA Distinguished Paper Award, 2021
• POPL Distinguished Paper Award, 2021
• Microsoft Recruitment Award University of Washington, 2018
• CRA Outstanding Undergraduate Researcher - Finalist Tufts Un…

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