13 research outputs found
PSSA-g-PANI/Graphene Oxide ๋ณตํฉ์ฒด์ ์ ๊ธฐํ์์ ์ง ์ ๊ณต ์์ก ์ธต์ผ๋ก์ ์ ์ฉ๊ณผ
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ผ๋ฌธ (์์ฌ)-- ์์ธ๋ํ๊ต ๋ํ์ : ์ฌ๋ฃ๊ณตํ๋ถ, 2014. 2. ์กฐ์ํธ.A new class of hole transport layer (HTL), which is composed of poly(styrene sulfonic acid) grafted with polyaniline (PSSAโgโPANI) and graphene oxide (GO), was prepared by adding GO into PSSAโgโPANI aqueous solution. The PSSAโgโPANI/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 PSSAโgโPANI/GO composite.Contents
Abstract i
List of Schemes โ
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List of Figures โ
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List of Tables โ
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Chapter 1. Introduction 1
Chapter 2. Experimental Section 6
2.1. Materials 6
2.2. Synthesis of PSSAโgโPANI 6
2.3. Synthesis of graphene oxide 8
2.4. Preparation of PSSAโgโPANI/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_๋ฐํฅ์.pdfDEPT_NM:์ฌ๋ฃ๊ณตํ๋ถEMAIL:[email protected]: