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Title: Mutual Photoluminescence Quenching and Photovoltaic Effect in Large-Area Single-Layer MoS 2 –Polymer Heterojunctions

Journal Article · · ACS Nano
 [1];  [2];  [2];  [1];  [1];  [1]
  1. Northwestern Univ., Evanston, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Northwestern Univ., Evanston, IL (United States)

Two-dimensional transition metal dichalcogenides (TMDCs) have recently attracted attention due to their superlative optical and electronic properties. Specifically, their extraordinary optical absorption and semiconducting band gap have enabled demonstrations of photovoltaic response from heterostructures composed of TMDCs and other organic or inorganic materials. Yet, these early studies were limited to devices at the micrometer scale and/or failed to exploit the unique optical absorption properties of single-layer TMDCs. In this work, we present an experimental realization of a large-area type-II photovoltaic heterojunction using single-layer molybdenum disulfide (MoS2) as the primary absorber, by coupling it to the organic π-donor polymer PTB7. This TMDC–polymer heterojunction exhibits photoluminescence intensity that is tunable as a function of the thickness of the polymer layer, ultimately enabling complete quenching of the TMDC photoluminescence. The strong optical absorption in the TMDC–polymer heterojunction produces an internal quantum efficiency exceeding 40% for an overall cell thickness of less than 20 nm, resulting in exceptional current density per absorbing thickness in comparison to other organic and inorganic solar cells. Moreover, this work provides insight into the recombination processes in type-II TMDC–polymer heterojunctions and thus provides quantitative guidance to ongoing efforts to realize efficient TMDC-based solar cells.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Argonne-Northwestern Solar Energy Research Center (ANSER)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001059
OSTI ID:
1388163
Journal Information:
ACS Nano, Vol. 10, Issue 11; Related Information: ANSER partners with Northwestern University (lead); Argonne National Laboratory; University of Chicago; University of Illinois, Urbana-Champaign; Yale University; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 85 works
Citation information provided by
Web of Science

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Cited By (12)

Multi-terminal memtransistors from polycrystalline monolayer molybdenum disulfide journal February 2018
Synthesis, properties, and optoelectronic applications of two-dimensional MoS 2 and MoS 2 -based heterostructures journal January 2018
Proton–electron-coupled MoS 2 synaptic transistors with a natural renewable biopolymer neurotransmitter for brain-inspired neuromorphic learning journal January 2019
Bithiazolidinylidene polymers: synthesis and electronic interactions with transition metal dichalcogenides journal January 2018
Probing the Growth Improvement of Large-Size High Quality Monolayer MoS2 by APCVD journal March 2019
Interface Characterization and Control of 2D Materials and Heterostructures journal July 2018
2D–Organic Hybrid Heterostructures for Optoelectronic Applications journal February 2019
Recent advancement in the performance of solar cells by incorporating transition metal dichalcogenides as counter electrode and photoabsorber journal February 2019
2D Photovoltaic Devices: Progress and Prospects journal January 2018
2D MoS 2 Neuromorphic Devices for Brain-Like Computational Systems journal May 2017
Multifield‐Inspired Tunable Carrier Effects Based on Ferroelectric‐Silicon PN Heterojunction journal November 2019
Two-step fabrication of large-scale MoS 2 hollow flakes journal January 2018