Interface Engineering for High Performance Bulk-Heterojunction Polymeric Solar Cells - Organic Solar Cells: Materials and Device Physics - page 43

Chapter 3
Interface Engineering for High
Performance Bulk-Heterojunction
Polymeric Solar Cells
Chunhui Duan, Chengmei Zhong, Fei Huang and Yong Cao
Abstract The nature of electrical contact between the bulk-heterojunction (BHJ)
layer and the electrodes is critical to the overall performance and stability of
polymer solar cells (PSCs). In recent years, considerable efforts have been devoted
to the interface engineering of BHJ-PSCs. In this chapter, we reviewed the devel-
opment of interface modification materials and their applications in BHJ-PSCs.
The discussions were divided into several sections according to the device config-
uration of BHJ-PSCs, i.e., conventional device, inverted device, and tandem device.
For single junction devices (including conventional and inverted devices),
we highlighted the interface modification materials which were applied at both
electron-collecting and hole-collecting electrodes, including inorganic materials
(such as metals, salts, semiconducting oxides, etc.), self-assembled monolayers
(SAMs) or SAMs-modified functional layers, and organic/polymeric materials.
For tandem devices, the discussions were focused on the functional materials
utilized as intermediate connectors. As discussed in this chapter, the development of
interface modification materials has resulted in great progress in BHJ-PSCs, which
can potentially pave the way for the commercialization of BHJ-PSCs.
3.1 Introduction
Bulk-heterojunction (BHJ) polymer solar cell (PSC) is one of the most promising
photovoltaic techniques to directly convert the terrestrial solar radiation into
electricity because of their compatibility with low-cost, large-scale fabrication by