-Based Organic Hybrid Solar Cells with Doping

Zühal Alparslan,Osman Örnek,Yusuf Yerli,S Eren San,Arif Kösemen

doi:10.1155/2011/734618

Abstract

A hybrid solar cell is designed and proposed as a feasible and reasonable alternative, according to acquired efficiency with the employment of TiO2(titanium dioxide) and Mn-doped TiO2thin films. In the scope of this work, TiO2(titanium dioxide) and Mn:TiO2hybrid organic thin films are proposed as charge transporter layer in polymer solar cells. Poly(3-hexylthiophene):phenyl-C61-butyric acid methyl ester (P3HT: PCBM) is used as active layer. When the Mn-doped TiO2solar cells were compared with pure TiO2cells, Mn-doped samples revealed a noteworthy efficiency enhancement with respect to undoped-TiO2-based cells. The highest conversion efficiency was obtained to be 2.44% at the ratio of 3.5% (wt/wt) Mn doping.

Highlights

Main criteria in choosing material for photovoltaic devices are feasibility and environmental convenience, as well as compatibility to solar spectra and easy and cheap production [1]
In the scope of this work, TiO2 and Mn:TiO2 hybrid organic thin films are proposed as charge transporter layer in polymer solar cells
Organic-based materials are promising for photovoltaic applications [2,3,4] with advantageous features such as low cost, easy production, and flexible application

Summary

Introduction

Main criteria in choosing material for photovoltaic devices are feasibility and environmental convenience, as well as compatibility to solar spectra and easy and cheap production [1]. Organic-based materials are satisfying with most of these mentioned criteria, charge transport properties of these materials are not so good and their efficiency is still quite low. PEDOT:PSS-based solar cells are known to be unstable in air conditions and under light illumination [12,13,14]. In these devices, electron collecting a metal cathode (e.g., Al, Ca) with low work function must be used but they are oxidized and lead to deterioration in performance. In inverted organic solar cells, the anode is an air-stable high-work-function metal collecting holes such as Ag. The ITO is used as the cathode to collect electrons. There are various studies to cope with mentioned interface problems [21]

Objectives

Findings

Discussion

Conclusion