Abstract
In this work, we measure the hole mobility in the model polymer system poly(3-hexylthiophene-2,5-diyl) by using different measurement techniques. Our main purpose is to determine how the recently developed charge extraction by a linearly increasing voltage technique for metal-insulator-metal devices (MIM-CELIV) compares to other commonly used methods, such as space charge limited currents and time-of-flight. Our findings suggest that the MIM-CELIV technique gives a slightly lower mobility than the other techniques, which is understandable given that the method measures the mobility of relaxed charge carriers in the dark unlike, for example, time-of-flight where charge carriers are photogenerated. In addition, we scrutinize the accuracy and reliability of the techniques used, showing that differences in mobility smaller than a factor of two are not detectable unless statistics from many devices are available.
Original language | English |
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Article number | 065203 |
Journal | AIP Advances |
Volume | 10 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2 Jun 2020 |
MoE publication type | A1 Journal article-refereed |
Keywords
- CELIV
- Charge transport
- Charge carrier mobility
- SCLC
- Time-of-flight
- Photo-CELIV
- MIM-CELIV