Journal of the Institute of Electronics and Information Engineers (전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Performance Improvement of TIPS-pentacene OTFTs by blending with Polystyrene

절연고분자 polystyrene 혼합에 의한 TIPS-pentacene OTFT의 성능 개선

  • Kim, Jae Seon (Department of Electronics Engineering, Dong-A University) ;
  • Song, Chung Kun (Department of Electronics Engineering, Dong-A University)
  • Received : 2013.05.08
  • Published : 2013.07.25
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Abstract

In this paper we analyzed the effects of polystyrene(PS) blended in TIPS-pentacene on the performance of OTFTs. With the various molecular weight and the content of PS the performance of TIPS-pentacene OTFTs was examined and the proper molecular weight and the content were extracted for the best results. With the molecular weight of 9,580 and 0.3 wt% of PS OTFTs produced the mobility of $1.0{\pm}0.19cm^2/V{\cdot}sec$, the subthreshold slope $0.22{\pm}0.05$ V/dec, the threshold voltage $-1.19{\pm}1.21$ V, the current on/of ratio $7.12{\pm}2.09{\times}10^6$. Additionally the suitable substrate temperature for ink jet printing of the blended TIPS-pentacene OTFTs was also extracted and it was $46^{\circ}C$.

본 논문에서는 절연 고분자 polystyrene(PS)을 TIPS-pentacene 용액에 혼합하여 OTFT를 제작하였고, PS의 분자량과 함량이 소자 성능에 미치는 영향을 분석하였다. 분자량 9,580의 PS가 분자량이 큰 것 보다 우수한 성능을 나타내었다. 그리고 함량은 0.3 wt%일 때 전계이동도는 $1.0{\pm}0.19cm^2/V{\cdot}sec$, 부문턱전압기울기는 $0.22{\pm}0.05$ V/dec, 문턱전압은 $-1.19{\pm}1.21$ V, 그리고 전류점멸비는 $7.12{\pm}2.09{\times}10^6$ 이었으며, PS를 혼합하지 않은 OTFT에 비하여 약 5배의 성능 개선이 있었다. 또한 잉크젯 공정에서 기판온도는 커피링을 제거하는 중요한 요소이며 PS를 혼합한 TIPS-pentacene의 적합한 온도는 $46^{\circ}C$로 확인되었다.

Keywords

References

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