Superior Noise Suppression, Response Time, and Device Stability of Non‐Fullerene System over Fullerene Counterpart in Organic Photodiode

Abstract

Herein, non-fullerene acceptor-based organic photodiodes are compared with fullerene acceptor-based organic photodiodes. The non-fullerene acceptor, ethylhexyl-rhodanine-benzothiadiazole-coupled indacenodithiophene (eh-IDTBR)-based organic photodiodes show a higher detectivity (1.61 × 10 13 cm Hz 1/2 W −1) and a faster response time (≈2.7 µs) than the fullerene acceptor, [6,6]-phenyl C 71 butyric acid methyl ester (PC 71 BM)-based organic photodiodes (3.25 × 10 12 cm Hz 1/2 W −1 and ≈6.24 µs, respectively) owing to the excellent dark current suppression of the carrier injection and the low trap density of eh-IDTBR. Moreover, the eh-IDTBR-based photodetector shows better operational device stability than the fullerene counterpart under electrical and thermal stress. This is corroborated by the morphology and crystallography analyses, both of which reveal that the eh-IDTBR-containing photo-sensitive films remain intact after imposing an external stress. This study elucidates important key advantages of the non-fullerene acceptor, eh-IDTBR, and sets a milestone as it compares the non-fullerene acceptors and fullerene acceptors in organic photodiodes for the first time. This work sets a new record for the performance and stability of solution-processable non-fullerene acceptor-based organic photodiodes.

Highly Sensitive Narrowband Photomultiplication‐Type Organic Photodetectors Prepared by Transfer‐Printed Technology

“…To further investigate the effect of incorporating PTPD in OFA layer on hole transport of narrowband PMOPDs, hole mobility (μ h ) was measured by using the space charge limited current (SCLC) method. [35,36] Holeonly devices were built with the structure of ITO/PEDOT:PSS/OFA layer (2.5 µm)/PM layer/ MoO 3 /Ag. The J-V curves of the holeonly devices are plotted as ln (Jd 3 /V 2 ) versus (V/d) 0.5 , as depicted in Figure 4c.…”

Recent Advances in Solution‐Processable Organic Photodetectors and Applications in Flexible Electronics

“…Recently, OPDs made from NFAs have shown significantly improved stability due to a stable morphology of photoactive later. [ 198 ] Besides, machine‐learning approaches, e.g., kernel ridge regression, [ 199 ] Random Forest regression, [ 200,201 ] decision tree, [ 202,203 ] and sequential minimal optimization regression, [ 204 ] have been demonstrated for predicting efficiency, stability, and significant attributes of devices. The machine‐learning methods can be applied to assist the time‐consuming experimentation and optimization in the development of stable OPDs.…”

Miniaturized VIS‐NIR Spectrometers Based on Narrowband and Tunable Transmission Cavity Organic Photodetectors with Ultrahigh Specific Detectivity above 1014 Jones

“…Mater. 2021, 33, 2102967 [11,13,15,18,22,27,[38][39][40][41][42][43][44][45][46][47][48][49][50][51] The performance values of the photodetectors from the literature are listed in Table S3, Supporting Information. of less than 10 −7 mbar.…”

“…D * spectra of TC-OPDs at zero bias with varied spacer (BPhen) layer thicknesses based on different active blends a) DCV5T-Me:C 60 , b) BDP-OMe:C 60 , and c) QM1:C 60 , respectively. d) Comparison of D * as a function of wavelength from previously reported photodetectors [11,13,15,18,22,27,[38][39][40][41][42][43][44][45][46][47][48][49][50][51]. The performance values of the photodetectors from the literature are listed in TableS3, Supporting Information.…”