3 years ago

High Photovoltaic Quantum Efficiency in Ultrathin van der Waals Heterostructures

High Photovoltaic Quantum Efficiency in Ultrathin van der Waals Heterostructures
Giulia Tagliabue, Artur R. Davoyan, Harry A. Atwater, Deep Jariwala, Kevin Tat, Michelle C. Sherrott, Joeson Wong
We report experimental measurements for ultrathin (<15 nm) van der Waals heterostructures exhibiting external quantum efficiencies exceeding 50% and show that these structures can achieve experimental absorbance >90%. By coupling electromagnetic simulations and experimental measurements, we show that pn WSe2/MoS2 heterojunctions with vertical carrier collection can have internal photocarrier collection efficiencies exceeding 70%.

Publisher URL: http://dx.doi.org/10.1021/acsnano.7b03148

DOI: 10.1021/acsnano.7b03148

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