| 학회 |
한국공업화학회 |
| 학술대회 |
2015년 가을 (11/04 ~ 11/06, 제주국제컨벤션센터(ICCJEJU)) |
| 권호 |
19권 2호 |
| 발표분야 |
고분자_포스터 |
| 제목 |
Side Chain Engineering of Polymer Acceptor for High Efficiency All-Polymer Solar Cells: Importance of Polymer Packing Structure and Nanoscale Blend Morphology |
| 초록 |
Despite the attractive features of all-polymer solar cells (all-PSCs), i.e., enhanced absorption coefficients, the tunability of their energetic and chemical properties and their thermal and mechanical stabilities, they still face the great challenge of having significantly low power conversion efficiency (PCE) values of only 3-5%. The prominent origins of the poor efficiency of all-PSCs are the undesirable features of the bulk-heterojunction (BHJ) blend morphology including the phase-separated large-scale domain size, reduced ordering of the polymer chains. Tuning side alkyl chains of conjugated polymers is an effective route for manipulating the blend morphology in BHJ type solar cells. However, the role of side chains in all-PSCs is poorly understood. Herein, we report high-performing all-PSCs with 5.96% efficiency by developing a series of naphthalenediimide (NDI)-based polymer acceptors with different alkyl side chains. We demonstrated that the use of the PNDIT with hexyldecyl side chains produced highly-ordered polymer stackings with strong face-on geometry and at the same time, forming the optimal BHJ morphology with finely separated phase domains, all of which contributed together to induce well-balanced μe/μh ratio and generate efficient all-PSCs with PCEs near 6%. |
| 저자 |
김범준1, Cheng Wang2, 우한영3, 김태수1, 이원호1, 이창연1, 김형준1
|
| 소속 |
1KAIST, 2Lawrence Berkeley National Laboratory, 3Korea Univ. |
| 키워드 |
All polymer solar cell; side chain Engineering; high efficiency; blend morphology
|
| E-Mail |
|
