TDK Flexible Amorphous Silicon Thin-Film Solar Cells (BCS Series)

TDK is the world’s first manufacturer to mass-produce flexible amorphous silicon thin-film solar cells with plastic substrates.

Its core manufacturing process is roll-to-roll plasma CVD coating, which deposits amorphous silicon (a-Si) photoelectric layers onto PET plastic films.

Unlike outdoor crystalline silicon photovoltaic panels, TDK’s products are optimized for power generation under low indoor light conditions.

This product is a flexible amorphous silicon photovoltaic (PV) cell built on thin-film substrates. It delivers high power conversion efficiency under indoor lighting such as fluorescent lamps and LEDs, as well as low-illumination environments, with a proven track record of market deployment over many years.It features ultra-light, ultra-thin construction, drop resistance, flexibility, and excellent shape machinability.

Furthermore, customizable design allows integration into a wide range of products. As a power generation component for energy harvesting (ambient power generation), it enables battery-free operation of devices.

Typical applications include wearables such as wristwatches and smartwatches, beacons, wireless sensor networks and other IoT devices.

Core Structure

PET flexible film substrate → ITO transparent conductive layer → P-I-N amorphous silicon photoelectric thin film → metal electrode → protective film

Key Physical Specifications (General Ratings)

• Thickness: 0.15~0.18 mm (electrode area ≤ 0.2 mm)

• Weight: Approximately 0.1 g for a Ø30 mm round cell, ultra-light and thin

• Flexibility: Minimum bending diameter Ø20 mm, suitable for attachment to curved casings

• Operating temperature range: -20℃ ~ +60℃

• Light source compatibility: Optimized for indoor LED and fluorescent lighting at 200~10000 lx; stable power output under low light