Printing and <italic style="font-style: italic">in situ</italic> Morphology Detection of Organic Thin Film Photovoltaic Devices

Ming Zhang; Lei Zhu; Chao-qun Qiu; Yong-ming Zhang; Feng Liu

doi:10.11777/j.issn1000-3304.2019.19010

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Printing and in situ Morphology Detection of Organic Thin Film Photovoltaic Devices

Research Article | 更新时间：2021-01-26

- Printing and in situ Morphology Detection of Organic Thin Film Photovoltaic Devices
- Acta Polymerica Sinica Vol. 50, Issue 4, Pages: 352-358(2019)
- 作者机构：
  
  1.上海交通大学物理与天文学院
  2. 化学化工学院　上海 200240
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2019.19010
  CLC：
- Published：2019-4，
  
  Published Online：18 March 2019，
  
  Received：14 January 2019，
  
  Revised：26 February 2019，
扫描看全文
Ming Zhang, Lei Zhu, Chao-qun Qiu, Yong-ming Zhang, Feng Liu. Printing and in situ Morphology Detection of Organic Thin Film Photovoltaic Devices. [J]. Acta Polymerica Sinica 50(4):352-358(2019)
DOI：

Ming Zhang, Lei Zhu, Chao-qun Qiu, Yong-ming Zhang, Feng Liu. Printing and in situ Morphology Detection of Organic Thin Film Photovoltaic Devices. [J]. Acta Polymerica Sinica 50(4):352-358(2019) DOI： 10.11777/j.issn1000-3304.2019.19010.

摘要

有机共混薄膜的干燥过程直接影响最终的内部形貌，通过原位散射的技术，可以实时监测薄膜生长过程中的形貌细节，从而进行形貌的研究和调控. 通过合理设计和运行原位检测系统，探究了高效率PTB7-th:PC

BM共混薄膜干燥过程中聚合物分子的结晶行为，以及添加剂1

8-diiodooctane (DIO)的加入对形貌调控产生作用. 同时，通过集成在系统中的印刷设备制备的印刷器件获得了接近9%的转换效率，具有较大的科学和商业价值.

Abstract

The drying process of organic films directly affects final morphology of blends and through

in situ

scattering technique

the details of morphology inside thin films can be monitored. By designing and running

in situ

detection system

the crystallization behaviour of polymer molecules in PTB7-th:PC

BM blend

which shows a high efficiency

and the effect of additive (DIO) on the morphology evolution during the process of drying can be investigated. It was observed that the packing style of polymer molecules inside the blend was similar to that of spin-coated samples

indicating that the change of coating mode would not affect the orientation of crystallization. From 2D GIXD profile

it was found that at the beginning of film-forming process

aggregates were formed in the solution

ordered but highly swollen by solvent. With the evaporation of the solvent

the degree of order increased and the solvent was expelled

causing a tighter arrangement of chains and a smaller spacing. With the removal of solvent

the effective size and ordered length scale of the aggregates decreased. The interaction between PTB7-th and DIO was different from that with solvent. As a poor solvent

DIO can slow down the drying process of thin films. Thus the addition of DIO led to the increase of crystal coherence length of PTB7-th. The crystallization of polymer molecule was completed at the beginning of film forming process

which was prolonged by the addition of DIO

but the final crystallinity of the blend was not affected. At the same time

through the printing equipment integrated in the system

the power conversion efficiency (PCE) of our printed devices reached nearly 9%

very close to the efficiency of spin-coated devices. This work strengthened the understanding of morphology inside organic photovoltaic thin films

promoted the progress of industrial production technology of organic photovoltaic devices and had great scientific and commercial value.

关键词

有机太阳能电池原位散射形貌调控印刷

Keywords

Organic photovoltaicIn situ sactteringMorphology controlPrinting

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Printing and in situ Morphology Detection of Organic Thin Film Photovoltaic Devices

DOI：10.11777/j.issn1000-3304.2019.19010

摘要

Abstract

关键词

Keywords

references