Influence of Temperature on Exciton Dynamic Processes in CuPc/C60 Based Solar Cells

Abstract

Although the effect of high temperature on the performance of organic solar cells has been widely investigated, it is inevitably influenced by the associated annealing effect (which usually leads to film morphology change and variation in electrical properties), which makes the discussion more sophisticated. In this study, we simplified the issue and investigated the influence of low temperatures (from room temperature to 77 K) on the photocurrent and internal/external quantum efficiency of a CuPc/C60 based solar cell. We found that besides the charge dynamic process (charge transport), one or more of the exciton dynamic processes, such as exciton diffusion and exciton dissociation, also play a significant role in affecting the photocurrent of organic solar cells at different temperatures. Additionally, the results showed that the temperature had negligible influence on the absorption of the CuPc film as well as the exciton generation process, but obviously influenced the other two exciton dynamic processes (exciton diffusion and exciton dissociation).

Insight into the Importance of Charge Transfer Dynamics in CsPbBr3 Perovskite Nanocrystals for Photovoltaic Applications

“…In this line, we have studied the energy band alignment of both the donor PNC and acceptor C 60 (Scheme a) which indicates a plausible ET from the excited PNC to the nearby C 60 . The values of conduction band minimum and valence band maximum of PNCs and the highest occupied molecular orbital and lowest unoccupied molecular level of C 60 are taken from previous reports. − …”

Preparation and operating characteristics analysis of high-speed iron phthalocyanine organic phototriode

“…extended π-conjugated structure leading to high dielectric constants and intrinsic conductivity [1]. Organic light-emitting diodes (OLEDs) [2], temperature sensors [3], solar cells [4] and photodetectors [5] based on MPCs have been reported many times. Liang et al [6] prepared planar structured photosensitive organic field-effect transistors with tin phthalocyanine (SnPc) as the active photosensitive material and the device has a millisecond photoelectric response under pulsed light irradiation at a frequency of 312 Hz.…”