Efficiency enhancement of ternary blend organic photovoltaic cells with molecular glasses as guest acceptors

Abstract

Previously reported glass-forming perylenediimide (PDI-glass) and diketopyrrolopyrrole (DPP-glass) acceptors were used as ternary components to modulate the morphology and electron transport properties of bulk heterojunctions composed of the polymer blend poly(3hexythiophene) (P3HT) and [6,6]-phenyl-C 61-butyric acid methyl ester (PC 61 BM). Both ternary acceptors show strong absorption in the visible range and energy levels intermediate between that of P3HT and PCBM. In the blends, both amorphous materials occupy the interface between P3HT and PCBM domains without significantly altering film morphology. The incorporation of 20 % PDI-glass and 15 % DPP-glass in ternary blend devices has resulted in conversion efficiency enhancements of 38% and 36 %, respectively. Additionally, the incident photon to electron conversion efficiency of the ternary devices of these materials was increased with additional photocurrent between 660-750 nm, indicating that these materials efficiently contribute to light harvesting. This justifies the efficiency enhancements via the charge transfer mechanism. Furthermore, these ternary devices show high stability towards both moisture and oxygen.

Charge Transport between Coaxial Polymer Nanorods and Grafted All-Inorganic Perovskite Nanocrystals for Hybrid Organic Solar Cells with Enhanced Photoconversion Efficiency

“…Because the exciton diffusion length in P3HT is very short (20–25 nm), most of the photogenerated excitons were harvested in the P3HT participate in geminate recombination (Figure S9e). The comparative literature presented in Table S3 with data from devices fabricated using ternary P3HT:PCBM photoactive layers containing different nanomaterials and polymers clearly shows that perovskite NC is the best candidate to improve the PCE of the widely investigated P3HT:PCBM-based devices. − …”

A “Rigid–Flexible” Approach for Processable Perylene Diimide-Based Polymers: Influence of the Specific Architecture on the Morphological, Dielectric, Optical, and Electronic Properties

“…As expected, the absorption spectrum for the rr-P3HT:[−O–PDI–O–(CH 2 ) 11 ] blends comprises a superposition of the characteristic absorption peaks of the rr-P3HT and [−O–PDI–O–(CH 2 ) 11 ] components. In solutions (Figure S3a), a main peak at 460 nm is observed because of the π–π* transition of rr-P3HT. , The second peak at 570 nm is attributed to [−O–PDI–O–(CH 2 ) 11 ] and becomes more intense in blend 2, where a higher quantity of [−O–PDI–O–(CH 2 ) 11 ] was added. In film form, Figure S3b, the typical absorption peak of rr-P3HT with a maximum at 560 nm was present in all blends, together with a shoulder at 605 nm, characteristic of rr-P3HT’s interchain transition.…”

Overview of printing and coating techniques in the production of organic photovoltaic cells

“…Despite being a less expensive technology, the loss of a large amount of solution makes this technique incompatible with the promising large-scale roll-toroll. 3,7,8,11,14,[45][46][47] Spin coating was used to form the donor G-P3HT in as mentioned the study 48 and the active layers P3HT:PCBM in the studies, 17,36,45,[49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65] P3HT:MIF in the study, 62 P3HS: PCBM in the study, 66 PTB7:PCBM in the study, 67 PTB7: PC 70 BM in the study, 68 PTB7:PC 71 BM and PTB7-Th: PC 71 BM in the study, 69 PBDB-T-SF:IT-4F in the study, 70 PBDB-T:PC 71 BM in the study, 71 PBDB-TSR:PC 71 BM in the study, 72 PBDB-T:ITC in the study, 73 PTB7-Th:PC 71 BM in the study, 74 P3HT:ICBA in the studies, 39,75-77 PTB7: PC 71 BM:P-GO in the study, 78 MEH-PPV:PCBM in the study, 79 ZnPc-TB:PTCBI in the study, 80 PEHBDT-DFDTBSe:PC 71 BM in the study, 75 PBDTTT-C:PCBM in the study, 81 PBDTT-F-TT:diPBI in the study, 82 PBDB-T: FH, PBDB-T:FM, PTB7-Th:NFBDT, and PTB7-Th:NOBDT in the study, 83 PSBTBT:PDI-DTT in the study, 84 PDBT-T1: SdiPBI-S in the study, 85 PBDT-8:PC 71 BM and PTIPSBDT-DFDTQX:PC 71 BM in the study 86…”

“…Spin coating was also used to process the PEDOT:PSS hole transport layers as mentioned in the studies, 36,39,42,45,49,51,52,54,56‐60,66,68,72,75‐77,82‐84,86‐96 Au@SiO 2 ‐WO 3 in the study, 65 GO/NiO x in the study, 97 PDDA‐GO in the study, 76 of the AgNWs cathode in an inverted OPV in the studies, 52,60 of the electron transport layers NaCl:MeOH in the study, 63 CNTs‐TiO x in the study, 55 FTO/PEIE in the study, 81 PEIE in the studies, 75,81,86 and ZnO in the studies 36,39,42,55,61,64,68,71,72,74,82,83 …”