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Issue 6, 2015
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A dopant free linear acene derivative as a hole transport material for perovskite pigmented solar cells

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Abstract

A solution processable, molecular organic semiconductor, 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-pentacene), was employed as hole transport material (HTM) in mesoscopic methylammonium lead iodide perovskite solar cells. TIPS-pentacene is potentially cost effective, exhibits a relatively high hole mobility and has a favourable HOMO level with respect to the valence band of perovskite. The photovoltaic performance of perovskite solar cells with TIPS-pentacene as HTM in its pristine form and with a dopant/additive was investigated and compared with classical spiro-OMeTAD based devices. Through solvoneering (solvent engineering) and concentration optimization TIPS-pentacene in its pristine form gave a very competitive power conversion efficiency (PCE) of 11.8% under 1 sun conditions. The open circuit voltage of 0.92 V and a short circuit current density of 20.86 mA cm−2 for the devices with pristine TIPS-pentacene were higher compared to doped spiro-OMeTAD based devices under similar conditions, thus paving the use of TIPS-pentacene as an alternative to an expensive spiro-OMeTAD for large area integration in perovskite based solar cells.

Graphical abstract: A dopant free linear acene derivative as a hole transport material for perovskite pigmented solar cells

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Publication details

The article was received on 22 Feb 2015, accepted on 13 May 2015 and first published on 13 May 2015


Article type: Paper
DOI: 10.1039/C5EE00599J
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Citation: Energy Environ. Sci., 2015,8, 1816-1823
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    A dopant free linear acene derivative as a hole transport material for perovskite pigmented solar cells

    S. Kazim, F. J. Ramos, P. Gao, M. K. Nazeeruddin, M. Grätzel and S. Ahmad, Energy Environ. Sci., 2015, 8, 1816
    DOI: 10.1039/C5EE00599J

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