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. 2017 Jul 25;11(7):7230-7240.
doi: 10.1021/acsnano.7b03148. Epub 2017 Jun 7.

High Photovoltaic Quantum Efficiency in Ultrathin van der Waals Heterostructures

Joeson Wong  1 , Deep Jariwala  1 , Giulia Tagliabue  1 , Kevin Tat  1 , Artur R Davoyan  1 , Michelle C Sherrott  1 , Harry A Atwater  1
Affiliations

High Photovoltaic Quantum Efficiency in Ultrathin van der Waals Heterostructures

Joeson Wong et al. ACS Nano. .

Abstract

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%.

Keywords: MoS2; WSe2; heterojunction; high efficiency; photovoltaics; quantum efficiency; van der Waals.

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