PSSA-g-PANI/Graphene Oxide 복합체의 유기태양전지 정공 수송 층으로의 적용과

학위논문 (석사)-- 서울대학교 대학원 : 재료공학부, 2014. 2. 조원호.A new class of hole transport layer (HTL), which is composed of poly(styrene sulfonic acid) grafted with polyaniline (PSSA–g–PANI) and graphene oxide (GO), was prepared by adding GO into PSSA–g–PANI aqueous solution. The PSSA–g–PANI/GO composites exhibit high optical transparency and high electrical conductivity. When the composite with 2.5 wt% GO loading was used as HTL material for the device based on poly(3-hexylthiophene) and PC61BM, the device exhibits an enhanced power conversion efficiency (PCE) of 4.23%, which is 23% higher than the PCE of device with the conventional HTL material, PEDOT:PSS. This enhancement of PCE arises mainly from an increase of the short-circuit current density due to higher optical transparency and higher electrical conductivity of PSSA–g–PANI/GO composite.Contents Abstract i List of Schemes ⅳ List of Figures ⅴ List of Tables ⅶ Chapter 1. Introduction 1 Chapter 2. Experimental Section 6 2.1. Materials 6 2.2. Synthesis of PSSA–g–PANI 6 2.3. Synthesis of graphene oxide 8 2.4. Preparation of PSSA–g–PANI/GO composites 12 2.4. Characterization 12 2.4. Device fabrication and characterization 13 Chapter 3. Results and Discussion 16 3.1. Synthesis and characterization 16 3.2. Optical properties 17 3.3. Electrical properties 18 3.4. Photoelectrical properties 20 3.5. Electrochemical properties 21 3.6. Photovoltaic properties 35 3.7. Discussions 44 Chapter 4. Conclusions 45 Bibliography 46 Korean Abstract 51Maste

Enhanced Performance of Polymer Solar Cells with PSSA-g-PANI/Graphene Oxide as Hole Transport Layer

Hole transport layer (HTL) has always been used for high performance polymer solar cells (PSCs) because of efficient hole extraction from active layer to anode and lowering the contact resistance between active layer and anode. Although PEDOT:PSS has commonly been used as a HTL, it has detrimental problems with low electrical conductivity, acidic nature and large aggregates. As an alternative to PEDOT:PSS, we previously synthesized poly(styrenesulfonic acid)-graft-polyaniline (PSSA-g-PANI) which is a self-doped conducting copolymer, and reported significant enhancement of the power conversion efficiency (PCE) of PSCs when it was used as a HTL of PSCs. In this work, we prepared PSSA-g-PANI/graphene oxide (GO) composite by adding GO into PSSA-g-PANI and used the composite as HTL of PSCs for the purpose to further improve the PCE. When the PSSA-g-PANI/GO (95/5) composite was used as HTL, the PCE of PSCs was improved by about 10% as compared to that without GO.OAIID:oai:osos.snu.ac.kr:snu2013-01/104/0000001236/12SEQ:12PERF_CD:SNU2013-01EVAL_ITEM_CD:104USER_ID:0000001236ADJUST_YN:NEMP_ID:A004558DEPT_CD:445CITE_RATE:0FILENAME:0411 12_박흥수.pdfDEPT_NM:재료공학부EMAIL:[email protected]: