高分子發光二極體(PLEDs)元件的製造方式中，最常使用方法為高分子混摻，不論是藉由與非發光之高分子的混合，來達到稀釋的效用，或者是與其他的共軛發光高分子混摻，皆可達到改良發光層之效果。本研究的目標就是嘗試將光致發光之超分子─poly[9,9-dioctyl-2,7-fluorene-alt-2,5-(3-hexylsulfonylthiophene)] (PFOT)與非發光之高分子混摻製作成薄膜。PFOT是由芴及噻吩衍生物交替組成的共軛共聚高分子，剛性平面的結構，加上足夠的共軛雙鍵數，使得芴之吸收波長落在可見光範圍內，至於噻吩則是具有良好的成膜性、明顯的吸收度和高電荷傳輸的特性。
首先，以不同濃度之PFOT來探討溶液狀態及薄膜狀態的表現，在薄膜固體下，因為團聚的現象，造成分散性不如在液體中良好。因此，為了要改善固態薄膜時的光學性質，便利用PFOT與不具備發光特性之高分子如PC來作混摻，透過添加量的變化、製程轉速的修正，以及摻混物質的改變等方式，發現到摻入非發光之高分子能夠降低PFOT分子鏈之間的作用力，達到增進薄膜態之光學表現。混摻後的薄膜又以分散在EVA中的效果最高，測得的螢光強度最多可至純PFOT薄膜的6倍。

Polymer blending is practiced frequently for the fabrication of PLEDs. The optical properties may be enhanced or modified by blending a luminescent conjugated polymer with another material, either a photonically inert polymer due to the dilution effect, or another luminescent conjugated polymer. In this research, a supramolecular polymer with photoluminescence, poly[9,9-dioctyl-2,7-fluorene-alt-2,5-(3-hexyl- sulfonylthiophene)](PFOT) was used to blend with another nonluminescent polymer.
PFOT is a conjugated alternating copolymer which is derived from fluorene and thiophene. The fluorene moiety spans the entire visible range owing to the rigid coplanar structure and sufficient conjugation of double bonds while the thiophene moiety affords good film-forming, strong absorption, and high hole-transporting properties.
First of all, various solutions and films with different concentrations of PFOT were prepared and characterized. The results reveal that phase separation in solid state is worse than in solution state due to the increased aggregation. For this reason, blending PFOT with another nonluminescent polymer such as PC was conducted in order to make progress on optical properties of solid film. Through the variations of doping amount, spin speed of coating processes, and being separated by four kinds of matrices, it was found that the introduction of photonically inert polymer could reduce interchain interactions which improve the optical properties of thin film. Especially with EVA, the blending film yielded up to 6 times the photoluminescence of the neat PFOT film.

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