Bilayer-Ternary Polymer Solar Cells Fabricated Using Spontaneous Spreading on Water

被引：28

作者：

Colberts, Fallon J. M. ^{[1
]}

Wienk, Martijn M. ^{[1
]}

Heuvel, Ruurd ^{[1
]}

Li, Weiwei ^{[2
]}

Le Corre, Vincent M. ^{[3
]}

Koster, L. Jan Anton ^{[3
]}

Janssen, Rene A. J. ^{[1
,4
]}

机构：

[1] Eindhoven Univ Technol, Inst Complex Mol Syst, Mol Mat & Nanosyst, POB 513, NL-5600 MB Eindhoven, Netherlands

[2] Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

[3] Univ Groningen, Zernike Inst Adv Mat, Photophys & Optoelect, Nijenborgh 4, NL-9747 AG Groningen, Netherlands

[4] Dutch Inst Fundamental Energy Res, Zaale 20, NL-5612 AJ Eindhoven, Netherlands

来源：

ADVANCED ENERGY MATERIALS | 2018年 / 8卷 / 32期

基金：

欧洲研究理事会;

关键词：

bilayer-ternary solar cells; polymer solar cells; sequential deposition; spontaneous spreading; CHARGE-LIMITED CURRENTS; EFFICIENCY;

D O I：

10.1002/aenm.201802197

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new method is presented to fabricate bilayer organic solar cells via sequential deposition of bulk-heterojunction layers obtained using spontaneous spreading of polymer-fullerene blends on a water surface. Using two layers of a small bandgap diketopyrrolopyrrole polymer-fullerene blend, a small improvement in power conversion efficiency (PCE) from 4.9% to 5.1% is obtained compared to spin-coated devices of similar thickness. Next, bilayer-ternary cells are fabricated by first spin coating a wide bandgap thiophene polymer-fullerene blend, followed by depositing a small bandgap diketopyrrolopyrrole polymer-fullerene layer by transfer from a water surface. These novel bilayer-ternary devices feature a PCE of 5.9%, higher than that of the individual layers. Remarkable, external quantum efficiencies (EQEs) over 100% are measured for the wide bandgap layer under near-infrared bias light illumination. Drift-diffusion calculations confirm that near-infrared bias illumination can result in a significant increase in EQE as a result of a change in the internal electric field in the device, but cannot yet account for the magnitude of the effect. The experimental results indicate that the high EQEs over 100% under bias illumination are related to a barrier for electron transport over the interface between the two blends.

引用

页数：12

共 40 条

[11]

Heuvel R., 2017, J MATER CHEM C, V25, P3182

[12] Recent advances in organic ternary solar cells [J].