Recent Advances in Single‐Junction Organic Solar Cells

Abstract

Single‐junction organic solar cells (OSCs) have made significant progress in recent years. Innovations in material design and device optimization have improved the power conversion efficiencies to over 19 %. In this Minireview, based on recent advances, we discuss molecular design strategies to tune the absorption spectrum, energy level, and intermolecular aggregation as well as highlight the role of molecular electrostatic potential in decreasing energy loss. Then, we introduce the latest progress in four types of OSCs composed of different donor:acceptor combinations: polymer donor:small‐molecule acceptor, all‐polymer, all‐small‐molecule, and small‐molecule donor:polymer acceptor. Finally, the challenges of OSCs in practical applications, including material cost, stability, and multi‐function integration, are discussed.

On the relationship of the effective mobility and photoconductance mobility in organic solar cells

“…The values of m har max and m har min (green dots) as well as m geo max and m geo min (orange dash-dots) for the studied blends were calculated by inserting the experimentally determined m ph and m exp eff either into eqn ( 8) and ( 9) or into eqn (11) and (12). The first set of equations is used, if the experimentally determined effective mobility m exp eff is interpreted as the harmonic mean and the second set of equations is used, if m exp eff is interpreted as the geometric mean.…”

Investigation of n-ZnO/p-Si and n-TiO2/p-Si Heterojunction Solar Cells: TCAD + DFT

“…Therefore, it is necessary to find new materials for solar cells. Over the past decade, there has been a huge interest in perovskite [21], organic materials [22] and metal oxides [23] as potential candidates for solar cells. Accordingly, the efficiency of perovskite-based solar cells has seen a significant improvement from 3.9% to 25.5% [24].…”

Photostability of Organic Field-Effect Transistors

“…Solution-processable organic semiconductor materials are very attractive for applications in large-area, flexible, lightweight, and wearable electronics due to their unique advantages of tunable optoelectronic properties and process compatibility with different device fabrication technologies. Remarkable progresses have been made in the development of high-performance organic light-emitting diodes (OLEDs), − organic solar cells, − organic photodetectors, − and organic field-effect transistors (OFETs) − OFETs with a high-mobility polymer channel layer that can be prepared by solution fabrication processes, e.g., inject printing and roll-to-roll printing, are very attractive for application in large-area flexible backplanes, image sensors, and displays. The mechanical flexibility and tunable optoelectronic properties of high-mobility polymer semiconductors also make them suitable for use in flexible and transparent optoelectronics.…”