12 citations · 28 across the 6 of their papers we have counts for
8 papers
Architecture Optimization Dramatically Improves Reverse Bias Stability in Perovskite Solar Cells: A Role of Polymer Hole Transport Layers
Fangyuan Jiang, Yangwei Shi, Tanka R. Rana +13
We report that device architecture engineering has a substantial impact on the reverse bias instability that has been reported as a critical issue in commercializing perovskite sol…
Resolving nonlinear recombination dynamics in semiconductors via ultrafast excitation correlation spectroscopy: Photoluminescence versus photocurrent detection
Esteban Rojas-Gatjens, Kaila Yallum, Yangwei Shi +7
We explore the application of excitation correlation spectroscopy to detect nonlinear photophysical dynamics in two distinct semiconductor classes through time-integrated photolumi…
(3-Aminopropyl)trimethoxysilane Surface Passivation Improves Perovskite Solar Cell Performance by Reducing Surface Recombination Velocity
Yangwei Shi, Esteban Rojas-Gatjens, Jian Wang +8
We demonstrate reduced surface recombination velocity (SRV) and enhanced power-conversion efficiency (PCE) in mixed-cation mixed-halide perovskite solar cells by using (3-aminoprop…
Ethylenediamine Addition Improves Performance and Suppresses Phase Instabilities in Mixed-Halide Perovskites
Margherita Taddei, Joel A. Smith, Benjamin M. Gallant +10
We show that adding ethylenediamine (EDA) to perovskite precursor solution improves the photovoltaic device performance and material stability of high-bromide-content, methylammoni…
Direct visualization of percolating metal-insulator transition in V2O3 using scanning microwave impedance microscopy
Weiyan Lin, Huanyu Zhang, Yoav Kalcheim +9
Using the extensively studied V2O3 as a prototype system, we investigate the role of percolation in metal-insulator transition (MIT). We apply scanning microwave impedance microsco…
Online Paging with a Vanishing Regret
Yuval Emek, Shay Kutten, Yangguang Shi
This paper considers a variant of the online paging problem, where the online algorithm has access to multiple predictors, each producing a sequence of predictions for the page arr…
Stateful Posted Pricing with Vanishing Regret via Dynamic Deterministic Markov Decision Processes
Yuval Emek, Ron Lavi, Rad Niazadeh +1
In this paper, a rather general online problem called dynamic resource allocation with capacity constraints (DRACC) is introduced and studied in the realm of posted price mechanism…
Bayesian Generalized Network Design
Yuval Emek, Shay Kutten, Ron Lavi +1
We study network coordination problems, as captured by the setting of generalized network design (Emek et al., STOC 2018), in the face of uncertainty resulting from partial informa…