Recent Advances of Self-Healing Electronic Materials Applied in Organic Field-Effect Transistors

Abstract

Self-healing materials play an essential role in the field of organic electronics with numerous stunning applications such as novel integrated and wearable devices. With the development of stretchable, printable, and implantable electronics, organic field-effect transistors (OFETs) with a self-healable capability are becoming increasingly important both academically and industrially. However, the related research work is still in the initial stage due to the challenges in developing robust self-healing electronic materials with both electronic and mechanical properties. In this mini-review, we have summarized the recent research progress in self-healing materials used in OFETs from conductor, semiconductor, and insulator materials. Moreover, the relationship between the material design and device performance for self-healing properties is also further discussed. Finally, the primary challenges and outlook in this field are introduced. We believe that the review will shed light on the development of self-healing electronic materials for application in OFETs.

Decoding Polymeric Additive‐Driven Self‐Healing Processes in Perovskite Solar Cells from Chemical and Physical Bonding Perspectives

“…Evaluation of the self-healing aptitude of materials encompasses three essential elements: localization (the position of the damage), temporality (the recovery time), and mobility (the dynamic interactions). [74,75] To this end, healing efficiency (𝜂) is often determined using two prevalent calculation formulas:…”

Stretchable and Self‐Healable Semiconductive Composites Based on Hydrogen Bonding Cross‐linked Elastomeric Matrix

“…[8] In this regard, researchers developed a strong interest in making selfhealing semiconductors or composites to mitigate above mentioned issues. [4][5][6][7]16] Most efforts have focused on modifying chemical structures via backbone/sidechain engineering to develop stretchable and self-healable CPs. To improve stretchability, attaching longer, and branched alkyl side chains, [17][18][19][20][21] inserting flexible conjugation breaker spacers, [15,[22][23][24][25][26][27][28] and copolymerizing soft segments with conjugated polymers [29][30][31][32][33][34] are generally used.…”

“…[ 8 ] In this regard, researchers developed a strong interest in making self‐healing semiconductors or composites to mitigate above mentioned issues. [ 4–7,16 ]…”

“…Developing stretchable and self-healable semiconductors is very important to meet the growing interest in designing wearable and implantable electronics. [1][2][3][4][5][6][7][8] Conjugated polymers (CPs), due to a wide range of tunable chemical structures and high flexibility and deformability compared to their inorganic counterparts, are widely adopted in wearable devices and used as the charge transport layer. [9][10][11][12] Unfortunately, a rigid and coplanar backbone and high crystallinity are preferred to enable effective charge transport for CPs, commonly rendering them as rigid and brittle.…”

Leveraging Non-Covalent Interactions to Control the Morphology and Electrical and Mechanical Properties of Stretchable Semiconducting Composites

“…Stretchable semiconductors play a crucial role in the development of wearable and implantable devices such as healthcare monitoring, flexible electronics, and smart textiles. − Conjugated polymers (CPs), known for their unique tunable organic structures through synthesis, hold significant potential as stretchable semiconductors compared to their inorganic counterparts. − However, the inherent rigidity and coplanarity of CPs’ backbone, combined with their high degree of crystallinity-enhancing charge mobility, contradict the requirement for CPs to be soft and highly stretchable. − To address this challenge, researchers have explored various strategies to enhance stretchability. These strategies include the incorporation of long alkyl side chains, − the introduction of conjugation break spacers, ,− and the insertion of elastomer blocks. − …”