Using the Stark effect to understand charge generation in organic solar cells

Jelissa De Jonghe-Risse; Martina Causa'; Ester Buchaca-Domingo; Martin Heeney; Jacques E. Moser; Natalie Stingelin; Natalie Banerji

doi:10.1117/12.2190212

Using the Stark effect to understand charge generation in organic solar cells

Jelissa De Jonghe-Risse, Martina Causa', Ester Buchaca-Domingo, Martin Heeney, Jacques E. Moser, Natalie Stingelin, Natalie Banerji

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Scopus citations

Abstract

We have used a femtosecond-resolved spectroscopic technique based on the Stark effect (electromodulated differential absorption) in order to investigate free charge generation and charge drift in solar cell devices of neat conjugated polymer pBTTT and in its 1:1 (by weight) blend with PCBM. In the latter, the fullerene molecules intercalate between the polymer side-chains, yielding a co-crystal phase. Our results show that free charge generation in both materials is ultrafast and strongly dependent on the applied reverse bias. Charge drift to the electrodes (under strong reverse bias) occurs with comparable dynamics on the 1.2 ns time scale for neat pBTTT and the blend, and is probably dominated by hole transport within/between polymer chains.

Original language	English (US)
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Publisher	[email protected]
ISBN (Print)	9781628417159
DOIs	https://doi.org/10.1117/12.2190212
State	Published - Jan 1 2015
Externally published	Yes

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title = "Using the Stark effect to understand charge generation in organic solar cells",

abstract = "We have used a femtosecond-resolved spectroscopic technique based on the Stark effect (electromodulated differential absorption) in order to investigate free charge generation and charge drift in solar cell devices of neat conjugated polymer pBTTT and in its 1:1 (by weight) blend with PCBM. In the latter, the fullerene molecules intercalate between the polymer side-chains, yielding a co-crystal phase. Our results show that free charge generation in both materials is ultrafast and strongly dependent on the applied reverse bias. Charge drift to the electrodes (under strong reverse bias) occurs with comparable dynamics on the 1.2 ns time scale for neat pBTTT and the blend, and is probably dominated by hole transport within/between polymer chains.",

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T1 - Using the Stark effect to understand charge generation in organic solar cells

AU - De Jonghe-Risse, Jelissa

AU - Causa', Martina

AU - Buchaca-Domingo, Ester

AU - Heeney, Martin

AU - Moser, Jacques E.

AU - Stingelin, Natalie

AU - Banerji, Natalie

N1 - Generated from Scopus record by KAUST IRTS on 2023-02-14

PY - 2015/1/1

Y1 - 2015/1/1

N2 - We have used a femtosecond-resolved spectroscopic technique based on the Stark effect (electromodulated differential absorption) in order to investigate free charge generation and charge drift in solar cell devices of neat conjugated polymer pBTTT and in its 1:1 (by weight) blend with PCBM. In the latter, the fullerene molecules intercalate between the polymer side-chains, yielding a co-crystal phase. Our results show that free charge generation in both materials is ultrafast and strongly dependent on the applied reverse bias. Charge drift to the electrodes (under strong reverse bias) occurs with comparable dynamics on the 1.2 ns time scale for neat pBTTT and the blend, and is probably dominated by hole transport within/between polymer chains.

AB - We have used a femtosecond-resolved spectroscopic technique based on the Stark effect (electromodulated differential absorption) in order to investigate free charge generation and charge drift in solar cell devices of neat conjugated polymer pBTTT and in its 1:1 (by weight) blend with PCBM. In the latter, the fullerene molecules intercalate between the polymer side-chains, yielding a co-crystal phase. Our results show that free charge generation in both materials is ultrafast and strongly dependent on the applied reverse bias. Charge drift to the electrodes (under strong reverse bias) occurs with comparable dynamics on the 1.2 ns time scale for neat pBTTT and the blend, and is probably dominated by hole transport within/between polymer chains.

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U2 - 10.1117/12.2190212

DO - 10.1117/12.2190212

M3 - Conference contribution

SN - 9781628417159

BT - Proceedings of SPIE - The International Society for Optical Engineering

PB - [email protected]

ER -

Using the Stark effect to understand charge generation in organic solar cells

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