Hybrid Perovskite Solar Cells

6Carrier Transport Properties

Hiroyuki Fujiwara and Yoshitsune Kato

Gifu University, Department of Electrical, Electronic and Computer Engineering, 1‐1 Yanagido, Gifu, 501‐1193, Japan

6.1 Introduction

Transport of photo‐generated carriers is a critical factor in the operation of photovoltaic devices [1–3]. For carrier transport in solar cells, the most important physical parameter is carrier diffusion length defined by

(6.1)

where D and τ are the diffusion coefficient and carrier lifetime, respectively [1, 2]. The D is a simple linear function of carrier mobility μ, which is expressed by the Einstein relation:

(6.2)

where k_B, T, and ...