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Solution-processed pH-neutral Conjugated Polyelectrolyte Improves Interfacial Contact in Organic Solar Cells

Solution-processed pH-neutral Conjugated Polyelectrolyte Improves Interfacial Contact in Organic Solar Cells

Huiqiong Zhou, Yuan Zhang, Cheng-Kang Mai, Jason Seifter, Thuc-Quyen Nguyen, Guillermo C Bazan, Alan J Heeger

ACS Nano. 2015 Jan 27;9(1):371-7.

PMID: 25495025

Abstract:

The intrinsic acidic nature of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole-transporting layer (HTL) induces interfacial protonation and limits the device performance in organic solar cells based on basic pyridylthiadiazole units. By utilizing a pH neutral, water/alcohol soluble conjugated polyelectrolyte CPE-K as the HTL in p-DTS(PTTh2)2:PC71BM solar cells, a 60% enhancement in PCE has been obtained with an increased V(bi), reduced R(s), and improved charge extraction. These effects originate from the elimination of interfacial protonation and energy barrier compared with the PEDOT:PSS HTL.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS773105	DTS(PTTh2)2			Price

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