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Issue 6, 2018
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Solid-state-ligand-exchange free quantum dot ink-based solar cells with an efficiency of 10.9%

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Abstract

While colloidal quantum dot based solar cells (CQDSCs) have recently achieved power conversion efficiencies (PCE) up to 11.3%, the CQD active layers are fabricated almost exclusively by a combined process of in situ solid-state ligand exchange (SSE) with multiple layer-by-layer (LbL) deposition, which has been a major obstacle to high-throughput processing. In this work, we developed, for the first time, high-efficiency CQDSCs without using either the SSE or LbL technique. The fabrication of n–p quantum dot junctions by SSE-free direct coating was achieved using n-type CQD ink and p-type CQD ink. The ink based devices achieved a PCE of ∼11%, which is comparable to the current state-of-the-art performance. The CQD inks enabled, for the first time, use of the doctor-blade coating method for device fabrication. Notably, the PCE of the bladed CQDSCs was remarkably high, at >10%, which suggests its potential use in other industrially friendly processes.

Graphical abstract: Solid-state-ligand-exchange free quantum dot ink-based solar cells with an efficiency of 10.9%

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Publication details

The article was received on 26 Jan 2018, accepted on 06 Apr 2018 and first published on 06 Apr 2018


Article type: Paper
DOI: 10.1039/C8EE00278A
Citation: Energy Environ. Sci., 2018,11, 1603-1609
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    Solid-state-ligand-exchange free quantum dot ink-based solar cells with an efficiency of 10.9%

    H. Aqoma and S. Jang, Energy Environ. Sci., 2018, 11, 1603
    DOI: 10.1039/C8EE00278A

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